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Anthozoa body form

ADW: Anthozoa: INFORMATIO

The Class Anthozoa includes a variety of animals that have polyps with a flower-like appearance. In these forms, the gastrovascular cavity is large. It is divided by walls or septa, which arise as folds from the body wall. These folds, along with the mouth and pharynx, are usually arranged in a biradially symmetric pattern Theoretically, members of Cnidaria have life cycles that alternate between asexual polyps (the body as a vase shaped form), and sexual, free-swimming forms called medusae (singular medusa; the body in a bell-shaped form). However, members of Anthozoa live only as polyps Anthozoa consists of 10 orders and thousands of species. Adults are attached to the seabed, but their larvae are free-floating and can drift to new settlements. Anthozoans can secrete a nonliving substance around the outside of the body to support and protect their soft body tissues Physical Traits (Anatomy): They have a polyp body form which, as adults, is usually anchored (sessile) with the mouth facing upward. Structurally, it is made up of a basal disc that attaches to the seabed and a cylindrical body stalk. Inside the body is the gastrovascular cavity. The mouth opens upward and is surrounded by tentacles

Instead, they release sperm and eggs that form a planula, which attaches to some substrate on which the cnidarian grows. Some anthozoans can also reproduce asexually through budding. An anthozoan individual has a saclike, cylindrical body divided by ray-like partitions known as septa and a ring of tentacles surrounding the mouth Other articles where Anthozoa is discussed: cnidarian: (hydrozoans); Scyphozoa (scyphozoans); Anthozoa (anthozoans); and Cubozoa (cubozoans). All cnidarians share several attributes, supporting the theory that they had a single origin. Variety and symmetry of body forms, varied coloration, and the sometimes complex life histories of cnidarians fascinate layperson and scientist alike

Anthozoans only occur in the polyp body form. Their polyps are more complex than the other Cnidarian classes, and the colonies can grow to enormous sizes. Anthozoans include the hard corals, gorgonians, soft corals and sea anemones. Read more about corals in chapter 3 The class Anthozoa includes all cnidarians that exhibit a polyp body plan only; in other words, there is no medusa stage within their life cycle. Examples include sea anemones, sea pens, and corals, with an estimated number of 6,100 described species. Sea anemones are usually brightly colored and can attain a size of 1.8 to 10 cm in diameter

Anthozoa - New World Encyclopedi

  1. Class: Anthozoa: (corals) Sub class: Hexacorallia Order: Zoanthidia Small group of polypoid anthozoans that differ from most sea anemones (Actinaria) in details of internal anatomy. unlike most sea anemones, zoanthiniarians can form true colonies in which all members are connected by common tissue
  2. A coral outcrop on the Great Barrier Reef, Australia Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically live in compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton
  3. Question: In Anthozoa, Which Body Form Carries The Gonads? Select One: A. It Alternates During The Reproductive Cycles: The Polyp, Then The Medusa. O B. It Depends On The Species. O C. The Polyp O D
  4. Figure \(\PageIndex{1}\): Anthozoans: The sea anemone (a), like all anthozoans, has only a polyp body plan (b). The mouth of a sea anemone is surrounded by tentacles that bear cnidocytes. They have slit-like mouth openings and a pharynx, which is the muscular part of the digestive system that serves to ingest as well as egest food
  5. ant past of life cycle. Scyphozoa. Medusa form is do

The class Anthozoa (flower animals) includes sea anemones (Figure 1), sea pens, and corals, with an estimated number of 6,100 described species. Sea anemones are usually brightly colored and can attain a size of 1.8 to 10 cm in diameter. Individual animals are cylindrical in shape and are attached directly to a substrate. Figure 1 CLASS ANTHOZOA: solitary or colonial, only polyps (sexual or asexual) in life cycle, no medusae, digestive cavity of polyp subdivided by septa, marine. CLASS CUBOZOA: solitary, medusa stage only, cube body shape, 4 sets of tentacles, well developed eyes, highly venomous, about 20 species, marine

Corals and sea anemones (anthozoa) Smithsonian's

Anthozoans have have a cylindrical body crowned by a ring of tentacles surrounding the mouth. The mouth leads into a tubular pharynx which decreases for some distance into the body before opening into the gastrovascular cavity. Unlike other cnidarians, however, the cavity is subdivided by a number of radiating partitions, or separations Anthozoa(Anemones and corals) Phylum CnidariaClass AnthozoaNumber of families 130Thumbnail description Exclusively polypoid cnidarians. Tubular body with hollow tentacles around the mouth; has a pharynx that opens into a digestive cavity subdivided by infoldings of the gut wall. May be solitary or colonial, with or without an internal or external skeleton Anthozoan polyps have an internal pharynx, or stomodaeum, connecting the mouth to the coelenteron. Most species of cubozoans, hydrozoans, and scyphozoans pass through the medusoid and polypoid body forms, with medusae giving rise sexually to larvae that metamorphose into polyps, while polyps produce medusae asexually The medusa form is a free-swimming structure which consists of an umbrella-shaped body (called a bell), a fringe of tentacles that hang from the edge of the bell, a mouth opening located on the underside of the bell, and a gastrovascular cavity. The mesoglea layer of the medusa body wall is thick and jelly-like Anthozoa is alternatively considered the most basal or the most derived group. The former hypothesis posits that the polyp is the original body form, with the medusa (and metagenesis) being derived (Fig. 1A)

Class - Anthozoa (Sea Anemones, Corals

  1. structure produced by the calcium carbonate skeletons of coral polyps (Class Anthozoa). Coral reefs are found in warm, shallow oceans with low nutrient availability. They form the basis for rich communities of other invertebrates, plants, fish, and protists. The polyps live only on the reef surface
  2. Variation within Anthozoa. Molecular data (France et al. 1996; Berntson et al. 1999; see Discussion of Phylogenetic Relationships below) support the division of the class into two groups, which are externally distinguished by the number and form of a polyp's tentacles
  3. Anthozoa is a polyp, and class Hydrozoa contains both types of the body structure. They are almost cylindrical shaped animals. Solitary polyps are attached to the surface by the adoral end. The attachment with substrate occurs through the pedal disc which is a disk-like a holdfast
  4. What is anthozoa? Information on body structure, reproduction, evolution, classificatyion of anthozoas. Anthozoa facts. Anthozoa; is the scientific name for the large class of invertebrate animals that includes sea anemones, sea fans, and corals.Anthozoans, sometimes called actinozoans, inhabit salt waters throughout the world
  5. Cnidaria study guide by leximartell includes 81 questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades
  6. Class Anthozoa: sea anemones, corals, sea pens, etc. Class Cubozoa: box jellyfishes Class Scyphozoa: true jellyfishes ANTHOZOA — polyp body form only; simpler life histories; bilateral and biradial symmetry Class Hydrozoa: hydras, hydroids, hydromedusae MEDUSOZOA — most have both polyp and medusa; radial and tetraradial symmetr

Cnidaria - Anthozo

  1. They are classified into four classes: Anthozoa, Scyphozoa, Hydrozoa, and Cubozoa The medusa form is characterized by an umbrella-shaped organism that has a fringe of tentacles, a mouth cavity on the lower-facing side of the bell, and a gastrovascular cavity. This form is most commonly associated with adult jellyfish
  2. g larvae known as planula, which in turn transform into polyps that can undergo asexual reproduction to produce new polyps or form colonies
  3. The Anthozoa has a tall and narrow body with an opening at the top and arms spread around the opening. Anthozoa translates to flower animal, and they mostly eat plankton and sometimes fish. The fis h captured by nematocysts on the arm, and pushed through the opening, to be digested inside the body
  4. The basic body form of an anthozoan is the polyp. This consists of a tubular column topped by a flattened area, the oral disc, with a central mouth; a whorl of tentacles surrounds the mouth. In solitary individuals, the base of the polyp is the foot or pedal disc , which adheres to the substrate, while in colonial polyps, the base links to.
  5. ANTHOZOA (i.e., flower-animals), a group of animals belonging to the phylum Coelenterata (q.v.). Many of them form a strong skeleton known as coral (q.v.) . The term coral is applicable to the hard parts of any Coelenterate which secretes a firm skeletal support, but most of these forms are Anthozoa, and amongst them the term true coral.
  6. Class Anthozoa - medusa stage completely absent from life cycle, only the polyp body form is present. Both among and within these three groups there is tremendous diversity of form and lifestyle, with cnidarians of one sort or another inhabiting most aquatic habitats

Cnidarians are divided into two subphylums, the Medusozoa and Anthozoa. These sub classes are then classified into five classes; Scyphozoa, Cubozoa, and Hydrozoa, which are Medusozoans, and Hexacorallia and Octocorallia which are Anthozoans. Subphylum/Class Anthozoa. Cnidarians with only the polyp body form The class Anthozoa includes all cnidarians that exhibit a polyp body plan only; in other words, there is no medusa stage within their life cycle. Examples include sea anemones, sea pens, and corals, with an estimated number of 6,100 described species Diffusion: Cnidarians are classified into four main groups: non-moving (sessile) Anthozoa (sea anemones, corals, sea pens); Cubozoa (box jellies);swimming Scyphozoa (jellyfish); and Hydrozoa, a broad group that includes all the freshwater cnidarians as well as many marine forms.There are about 10, 000 species of Cnidarians. Cnidaria have no organs like hearts or lungs

Anthozoa class of cnidarians Britannic

Anthozoa is a class of marine invertebrates within the phylum Cnidaria that are unique among cnidarians in that they do not do not have a medusa stage in their development. These exclusively polypoid cnidarians are characterized by a tubular body with tentacles around the mouth and most are sedentary after the larval stage CLASS 3. Anthozoa -- The Sea Anemones, Corals, etc. The body cavity is broken up into a number of chambers by vertical septa, or partial walls. All anthozoa occur only as attached polyps; i.e., there is no medusa stage present in the life cycle. Most intertidal anthozoans are much larger than the hydrozoan polyps The mesoglea of Anthozoa consist of ameboid cells and fibrous connective tissues. Examples of Anthozoa include Xenia, Telesto, Metridium, Tubipora and more. These organisms have a gastrovascular cavity. Anthozoa protects its soft body tissues and lends support to its body by secreting nonliving substances around and outside its body Body multicellular, few tissues, some organelles. The Cnidaria come in two basic forms, a 'Polyp' form typified by the Sea Anemones and a 'Medusa' form typified by Jellyfish. Class Anthozoa • 7,128 living spp. Order Actiniaria • 1,138 living spp ANTHOZOA (i.e. flower-animals), the zoological name for a class of marine polyps forming coral (q.v.). Although corals have been familiar objects since the days of antiquity, and the variety known as the precious red coral has been for a long time an article of commerce in the Mediterranean, it was only in the 18th century that their true nature and structure came to be understood

then the relatively simple body form is the primitive state. Molecular phylogenetic analysis reveals that the splitting of the phylum Cnidaria into Anthozoa and Medusozoa probably took place. Difference between Polyp and Medusa Polyp and medusa are two different life cycle stages of many species of the phylum Cnidaria. The phylum Cnidaria includes species existing only in the polyp stage (Anthozoa), species existing in the medusa stage, and species with both life cycle stages (Hydrozoa). Corals, sea anemones, jellyfish, and hydroids are cnidarians 2. Body Form: Body form varies considerably. Many colonial cnidarians like Obelia (Fig. 4.15) are trimorphic, having three kinds of zooids — polyps, blastostyles and medusae. Occurrence of more than one type of individuals in their colonies performing different functions is called polymorphism. 3. Symmetry What body form do members of Class Anthozoa have? answer choices . medusa. polyp. medusa and polyp. Tags: Question 20 . SURVEY . 30 seconds . Q. Which organism moves by somersaulting? The medusa body form is adapted for sessile life while the polyp body form is adapted for free-swimming. answer choices . true. false. Tags: Question 31 Anthozoa is a class of marine invertebrates which includes the sea anemones, stony corals and soft corals. Anthozoa is included within the phylum Cnidaria, which also includes the jellyfish, box jellies and parasitic Myxozoa and Polypodiozoa. Anthozoans are carnivores, catching prey with their tentacles

Two distinct body plans are found in Cnidarians: the polyp or tuliplike stalk form and the medusa or bell form. (Figure 28.6).An example of the polyp form is found in the genus Hydra, whereas the most typical form of medusa is found in the group called the sea jellies (jellyfish).Polyp forms are sessile as adults, with a single opening (the mouth/anus) to the digestive cavity facing. Members of phylum Cnidaria are distinguished and classified on the basis of their body form. They occur either in a swimming medusae form or a sessile (permanently attached) polyp form. They are classified into four classes: Anthozoa, Scyphozoa, Hydrozoa, and Cubozo Anthozoans like scleractinian corals, sea pens, and sea fans live in the deep cold sea waters of the polar regions. Many of the theories also indicate that the medusa body form being the sexually reproductive phase of their life cycle is the original body form of the cnidarians that had evolved from the ancestral organisms

5.2: Phylum Cnidaria - Biology LibreText

Cnidarians are divided into two major groups : Anthozoa (sea anemones, corals and sea pens), which live as sessile polyps; and Medusozoa (jellyfish, sea wasps and Hydra), many, but not all, of which form a free-swimming medusa as well as polyps. Cnidarians in both groups have an external radial symmetry, yet internal asymmetries and. Class Anthozoa Members of the class Anthozoa display only polyp morphology and have cnidocyte-covered tentacles around their mouth opening. Class Anthozoa The class Anthozoa includes all cnidarians that exhibit a polyp body plan only; in other words, there is no medusa stage within their life cycle. Examples include sea anemones, sea pens, and corals, with an estimated number of 6,100. The class Anthozoa includes all cnidarians that exhibit a polyp body plan only; in other words, there is no medusa stage within their life cycle. Examples include sea anemones , sea pens, and corals, with an estimated number of 6,100 described species. Sea anemones are usually brightly colored and can attain a size of 1.8 to 10 cm in diameter

The body form is basically the external appearance or structure of an object or organism. Metridium is also commonly known as Anemones. It is an Anthozoa havinga smooth, cylindrical body that resemb view the full answe The body is perforated by pores and canals but there are no organs, such as mouth or nervous system. Though sponges are multicellular animals their cells do not form organised tissues. They usually have an endoskeleton of separate spicules. Digestion takes place within the cells. Because of their endoskeleton and obnoxious ferments they are. There are two body forms, polyps and medusae, structurally similar but the former usually fixed and benthonic, the latter usually floating. Of the three main classes, in the Hydrozoa, the most primitive, both body forms are generally developed, whereas the Scyphozoa are predominantly medusoid and the Anthozoa exclusively polypoid. The fossil.

A group of hydrozoan corals, the Hydrocorallina, is common throughout tropical and subtropical seas. A few species which form pink encrustations on rocks in deep water occur in Canadian waters. Anthozoa. Anthozoa includes sea anemones, corals and sea pens. Anemones tend to be solitary Cnidarians are astonishingly diverse in body form and lifestyle, including the presence of a jellyfish stage in medusozoans and its absence in anthozoans. Here, we sequence the genomes of Aurelia. An animal form that has both male and female reproductive organs. Hox code.Staggered expression of Hox genes along the anterior-posterior body axis in Bilateria that specifies axial identities and is colinear with Hox gene organization in the genome. Mesentery. Endodermal folds in anthozoan polyps that extend from the body wall into the gastric. Cnidaria is a class of animals that are found in marine and aquatic environments.They come under coelenterate phylum. Sea pen Cnidaria Characteristics. The cnidarians are defined as the diploblastic metazoa with tissue grade organization. They are referred to as the simplest metazoan Anthozoans form some interesting relationships with other sea organisms. Many corals, as well as anemones, house microscopic single-celled algae on and in their tissues. The algae help the corals by providing some of the raw materials they need to grow and build tissue. The body of the cubozoan is shaped like a cube or square. A tentacle or.

Phylum Cnidaria Boundless Biology - Lumen Learnin

Class 3. Anthozoa (Gr., anthos = flower+ zoios = animal) Exclusively marine. Solitary or conical. Exclusively polypoid. No medusoid stage. The body is usually cylindrical with hexamerous, octamerous, or polymerous biradial or radobilateral symmetry Stony corals belonging to the order Scleractinia (Anthozoa: Hexacorallia ) are a clade of cnidarians that build a calcium carbonate skeleton in the form of aragonite , and are sister group to the. Anthozoan definition, any marine coelenterate of the class Anthozoa, comprising colonial and solitary polyps and including corals, sea anemones, sea pens, etc. See more

-Members of the class Anthozoa are colonial or solitary and lack medusae.-They include anemones and stony and soft corals.-Anthozoans are all marine and are found at all depths.-Anthozoan polyps differ from hydrozoan polyps in three respects. 1. The mouth of an anthozoan leads to a pharynx, which is an invagination of the body wall that leads int 1. Polyps are a body form of cnidarians that are specialized for swimming. 2. Cnidarians are characterized by stinging spicules. 3. The life cycle of anthozoans includes medusae, planulae, and polyps. 4. A group of jellyfish is called a smack. Multiple Choice Identify the letter of the choice that best completes the statement or answers the. Phylum Cnidaria Phylum Cnidaria - stinging cell A.k.a Coelenterata (hollow cavity) Radiata (radial symmetry) One step above sponges Differ from sponges - have rudimentary organs Incomplete digestive & excretory systems No blood or circulatory system Classification 3 Classes Hydrozoa = Hydra Scyphozoa = Jellyfish Anthozoa = Sea anemones & coral Morphology Body wall - 3 layers. The wildlife trade is a major cause of species loss and a pathway for disease transmission. Socioeconomic drivers of the wildlife trade are influential at the local scale yet rarely accounted for in multinational agreements aimed at curtailing international trade in threatened species. In recent decades (1998-2018), approximately 421,000,000 threatened (i.e., CITES-listed) wild animals were. Anthozoa. Actinia is a large group of sedentary cnidarians. These creatures have a cylindrical body with an oral disc at the top, which has a slit-like mouth surrounded by numerous stinging tentacles. Soft corals do not form reefs and often live solitary lives. The northern species, however, can not only settle on solid substrates but.

ANTHOZOA (i.e. flower-animals), the zoological name for a class of marine polyps forming coral.Although corals have been familiar objects since the days of antiquity, and the variety known as the precious red coral has been for a long time an article of commerce in the Mediterranean, it was only in the 18th century that their true nature and structure came to be understood ANTHOZOA OF THE WOODS HOLE REGION. 227 thrust out of special pores, cinclides, or through improvised openings in the tissues of the body wall. The marginal portion of the oral disk bears the tentacles, which are usually hollow outgrowths from this part of the body. They vary greatly in size and number in different species and genera The class Anthozoa includes all cnidarians that exhibit a sessile polyp body plan only; in other words, there is no medusa stage within their life cycle. Examples include sea anemones, sea pens, and corals, with an estimated number of 6,100 described species

Video: Coral - Wikipedi

Solved: In Anthozoa, Which Body Form Carries The Gonads? S

Deep-Water Octocorals (Cnidaria, Anthozoa) from the Galápagos and Cocos Islands... 5 eter is about 4 mm, including the marginal spines. The polyps are short and cylindrical (Figures 4b-d), only about 1.2-1.4 mm in height, not counting the marginal spines, which can be up to twice as long as the polyp. The actual body wall is relatively shor Like all members of the class Anthozoa, sea anemones body wall in the region of blastopore and, therefore, is form mesenterial filaments lined by the epitheliu The position of Anthozoa nearest the beginning of the cnidarian family tree also implies that Anthozoa are the cnidarians most closely related to Bilateria, and this is supported by the fact that Anthozoa and Bilateria share some genes that determine the main axes of the body

28.2B: Class Anthozoa - Biology LibreText

There are three types of sponge body forms: ascon, sycon, and leucon. Ascon sponges are the simplest and least common sponge body from. These sponges have multiple ostia, this is where water enters the sponge, and only have one osculum, where water exits the sponge.The openings lead to the sponge's one central chamber called a spongocoel that is lined with choanocytes They are inside the body of the Cnidarians forming a symbiotic relationship. These Anthozoans that possess zooxanthellae usually live in shallow, well-lit waters forming coral reefs. We can consider this group of species as the main creators of reefs. There are species that form an exoskeleton composed of calcium carbonate

Cnidaria

Characteristics of the Cnidarians Flashcards Quizle

Cnidarian mitochondrial genomic data contain phylogenetic signal informative for understanding the evolutionary history of this phylum. Mitogenome-based phylogenies, which reject the monophyly of Anthozoa, provide further evidence for the polyp-first hypothesis. By rejecting the traditional Acrasped These organisms spend their time in the body form known as a polyp—these are sessile, which means they don't move about freely. Anthozoa is the Class in the Phylum Cnidaria to which Coral. Class Anthozoa - corals, sea anemones, sea fans; 6,200 sp. (fr. Gr. anthos = flower, zoa = animal) Anthozoans are the most advanced form of cnidarians. They occur only as polyps, and the polyp body is much more complex than that of the hydrozoans. The GVC is typically divided into six chambers, providing a large surface area for digestion Westholt, R., P. Kestler, O. Sicken, and W. Westheide, 2001. Effects of long-term ultraviolet radiation: the white form of Metridium senile (Anthozoa: Actiniaria) as a potential biological indicator for ultraviolet. Helgoland Marine Research 55: pp 87-93 Web sites

Classes in the Phylum Cnidaria Biology for Majors I

131 Week 4 Lab: Cnidaria - Professor St

Anthozoans exist only in the polyp form. In our discussion of Protist diversity (Tutorial 14), we addressed the symbioses between reef-building corals and the dinoflagellates. Recall that in these relationships, corals provide housing and protection for the protists, and the dinoflagellates provide food for the corals as the predominant body type. Examine Hydra, Obelia, and other examples, and draw at least one of them. Class Scyphozoa Jellyfish, characterized by a mobile floating form (medusa, with downward-facing mouth). Examine preserved specimens in jars and draw at least one of them. Class Anthozoa The corals, sea pens, and anemones, with polypoid forms an • Medusa is a free-swimming stage while polyp is a sessile form. • Medusae are prominent in Scyphozoans while polyps are the only forms in the Anthozoans. • Medusa is the reproductive stage and polyp is the asexual stage of Hydrozoans. • Medusa has its mouth directed downwards while polyp has it directed upwards Anthozoans are all marines and are found at all depths. Anthozoan polyps differ from hydrozoan polyps in three respects: 1. the moutrh of the Anthozoan leads to a pharynx, which is an invagination of the body wall that leads into the gastrovascular cavity; 2. mesenteries (membranes) that bear cnidocytesand gonads on their free edges divide the. This phylum of 9000 species includes some of the most beautiful and abundant marine animals assigned to three classes: Class Hydrozoa, Class Scyphozoa, Class Anthozoa.. Although outwardly very different in form, both flower-like polyps and free swimming medusae (jelly fish) share a simple radially symmetrical body plan with tentacles

Cnidarian mysteriespolyp | zoology | Britannica

Sea anemones belong to the Anthozoa, the largest class of the Cnidaria, which consists of over 6000 living species that include, in addition to the sea anemones, also the hexa and octo corals. All members of this class, which is strictly marine, possess only the polyp body form but not the medusa morph. Anthozoans cnidae typically lack an. The key difference between bryozoans and corals is that bryozoans are colonial aquatic animals that belong to phylum Bryozoa, while corals are colonial reef-building marine animals that belong to phylum Cnidaria.. Bryozoans and coral look similar. Both types of organisms are aquatic organisms that exist as colonial forms. They form a calcium carbonate skeleton connected to one another The flatworm's bilateral body plan has a head with a brain and stereo eyes that enable it to actively hunt. Its mouth and pharynx are in the center of its underside. With no circulatory system, the gut distributes food to all parts of the body Undischarged- regarding nematocysts, when the cap is closed and not attacking pray. Manubrium - A stalk-like structure hanging down from the center surrounded by oral arms, which connects with the mouth/anus at the base of the bell and emties into the GV Cavity. Radial Canals-Form part of the water vascular system, extending through each tentacle. Bell 1. What body form do they possess? What is it made up of? 2. What is the name of the specialized structure used as a float? 3. What do the stings cause? 4. Where are they found? 5. What habitat are they found in? 6. What is their diet? Station 16 - Class Hydrozoa - Gonionemus 1. What body form do they possess? 2. What is it often called? 3.

The two different forms of a Cnidarian body. A coral colony consists of hundreds or thousands of tiny polyps. Each polyp is an individual animal (basically a small anemone) but they live together as a group. The Lion's Mane Jelly is a venomous Scyphozoan which can sting people with its long tentacles The body form of rotifers consists of a head (which contains the corona), a trunk (which contains the organs), and the foot. Rotifers are typically free-swimming and truly planktonic organisms, but the toes or extensions of the foot can secrete a sticky material forming a holdfast to help them adhere to surfaces

Cnidaria - Skeletal Syste

Sea Anemones, Corals & Sea Pens - AnthozoaWow! Spellbinding Characteristics of CnidariansPracticum #2 - Biology 111 with Houston at Loyola
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