POLYP
It starts as a sessile polyp like creature and then buds to form motile medusoid adults.
no. Jelyfish have the ability to preform locomotion, so they are considered motile an example of something sessile would be a tree or a rock because they do not have the ability to move by their own power
MedusaMedusa
Medusa body form. Medusa-Umbrella shaped, tentacles hanging down. Swim about.
The free floating body form of cnidarians is called a medusa. Medusae have a bell-shaped body with tentacles hanging down, and they are often seen swimming in the water. Examples include jellyfish and hydromedusae.
All Cnidarians are mobile at some point in their lifetime. For most, it is in the larval stage. Jellyfish start out as mobile larva, then become sessile, then become the mobile jellyfish you are familiar with. Others, like corals, start out as mobile larva, settle down and remain sessile for the rest of their adult life. As adults, hydra can be mobile or sessile, as they choose, but they don't swim far.
A leaf without a petiole is called a sessile leaf.
An adult jellyfish is called a Jellyfish.
Collective nouns for jellyfish are:a bloom of jellyfish (When jellyfish are spawned from their polyps they form what is called a "bloom".)a brood of jellyfisha fluther of jellyfisha smack of jellyfisha smuck of jellyfisha smuth of jellyfisha stuck of jellyfisha swarm of jellyfishA fluther or a smuth of jellyfish.A group of jellyfish is called a smack of jellyfish.
An adult swimming cnidarian is called a medusa.
sessile
A group of jellyfish is called a "smack".FlutherA group of jellyfish is sometimes called a bloom or a swarm.A group of jellyfish is sometimes called a bloom or a swarm.