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...
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
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
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 ...
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
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
jellyfish, hydra, sea anemones, and corals. Though these vary greatly, ... The “
polyp” form is usually anchored (sessile) with the mouth facing upward. ... These
layers surround an inner cavity called the gastrovascular cavity. The epidermis ...
Dec 1, 2015 ... Cnidocytes contain large organelles called (a) nematocysts that store a coiled ...
Figure 28.2.3: The sessile form of Obelia geniculate has two types of polyps: ... (
jellyfish) and cubozoans (box jellies) are swimming forms.
The two phyla with the radial body plan like a pumpkin are called the radiata and
... While we wouldn't call a jellyfish quick, they can—unlike sponges—move a
little under their own power. ... During gastrulation, an embryo begins to form
layers that will become the ... The polyp is a shaped like a tube and is generally
Apr 6, 2015 ... The sessile polyplike forms constitute the order Stauromedusae. ... region, but
members of the genus Rhizostoma, also called football jellyfish, ...