An adult feather star is not sessile. It eventually develops arms and is able to move around. Sea lilies are sessile.
sessile
Plants and fungi are examples of sessile kingdoms, as they are organisms that are rooted in place and do not move from where they are anchored. They rely on external means, such as wind or animals, for seed dispersal.
One example of a sessile land animal is the barnacle. Barnacles are marine arthropods during their larval stage, but once they settle on a surface, they become sessile and attach themselves to rocks, docks, or other substrates. They filter feed using their feathery legs.
immobile animal/plant
Examples of sessile plants include mosses, liverworts, algae, and some species of fungi. These plants do not have a vascular system to transport water and nutrients, and they typically grow close to the ground or on other surfaces without the ability to move.
Feather stars and sea lilies are related but not the same. They both belong to the class Crinoidea, but feather stars can crawl and swim while sea lilies are sessile, anchored to the seafloor by a stalk.
Feather Stars reproduce by releasing eggs and sperm into the water.
The habitat of a feather star is the ocean.
Feather stars live in the western part of the Pacific Ocean and on both sides of the Atlantic Ocean
a hydra as a polyp is not sessile but when it grows to be a hydra it is sessile
Yes
Some can swim by undulating movements of the arms. Feather stars creep about by means of projections at the base of the crown, called cirri, which can grasp bottom objects.Source:http://www.encyclopedia.com/doc/1E1-feather-st.html
The order Comatulida.
fish and other echinoderms
they are sessile
Sessile means attached. So a sessile organism is attached to a substrate.
Feather stars are cold-blooded organisms, which means they do not regulate their internal body temperature and rely on their external environment to maintain their body temperature.