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Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic ... They have two basic body forms: swimming medusae and sessile polyps, both of which are radially symmet...

What is a sessile form of a jellyfish called - Answers.com


Why wouldn't a jellyfish form a fossil? ... What is the sessile body form of a cnidarian? ... It is called a jellyfish because it lives in the sea, although it isn't a fish.

Cnidaria - jelly fish, polyps and medusae - Bumblebees


Cnidaria - jelly fish, polyps and medusae taxonomy, physiology, and body pattern . ... sexually from medusae. Most medusae are mobile and the polyps tend to be sessile. ... They are located in special cells called cnidocytes. There are over ... Some species form a symbiotic relationship with green algae. Many species are ...

Cnidaria Facts, information, pictures | Encyclopedia.com articles ...


It includes aquatic organisms such as jellyfish, sea anemones, corals, and hydras . ... is surrounded by tentacles and leads to an internal digestive cavity called the .... The sessile hydroid, or polyp, form is more or less cylindrical, attached to its ...

polyp and medusa Facts, information, pictures | Encyclopedia.com ...


polyp and medusa names for the two body forms, one nonmotile and one typically ... The polyp is a sessile, or nonmotile, organism; well-known solitary polyps are the sea ... The medusa, when free swimming, is popularly known as a jellyfish. ... with nonliving material, forming a plantlike structure called a hydroid colony.



Sea anemones and corals have the polyp form, while jellyfish are typical medusae. ... Cnidarians are classified into four main groups: non-moving (sessile ) ... layers (the ectoderm and the endoderm) separated by a jelly-like layer called the ...

Jellyfish life cycle (Scyphozoa) - The Scyphozoan


Most scyphozoan jellyfishes—including most of the large jellyfish with which ... a sessile (i.e. fixed-position), usually benthic (i.e. bottom dwelling) polyp called a ...

polyp | zoology | Britannica.com


In zoology, one of two principal body forms occurring in members of the animal phylum Cnidaria. ... sea anemone, or colonial, as in coral, and is sessile ( attached to a surface). ... tentacles that bear complex stinging structures called nematocysts. ... Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, ...

jellyfish | marine invertebrate | Britannica.com


Apr 6, 2015 ... The sessile polyplike forms constitute the order Stauromedusae. ... region, but members of the genus Rhizostoma, also called football jellyfish, ...

Phylum Cnidaria - Boundless


Animals from the phylum Cnidaria have stinging cells called cnidocytes. ... perhaps the most well-known medusoid animals are the jellies (jellyfish). Polyp forms are sessile as adults, with a single opening to the digestive system (the mouth) ...

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The Life Cycle of a Jellyfish - Animals & Wildlife - About.com


The medusa form is the dominant and most recognized form of the jellyfish. ... This polyp stage in the jellyfish life cycle is a sessile stage, so called because the  ...

sponges & cnidarian notes b1 - Biology Junction


Flagellated cells called choanocytes or collar cells line their internal body cavity ... Polyp forms are usually sessile with upright tentacles arranged around the mouth at the top and ... Jellyfish & Portuguese man-of-war are medusa form as adults.

Phylum - Cnidaria (Jellyfish, Anemones, Corals ... - Exploring Nature


This body form is dominant in the adult true jellyfish, though they pass through a polyp ... The “polyp” form is usually anchored (sessile) with the mouth facing upward. ... These layers surround an inner cavity called the gastrovascular cavity.