they are sessile
well all i know is sessile you stay in the same place and mobile you can live many places
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.
Barnacles are sessile as adults. They start out as mobile larvae and attach to something big like a whale or a boat. Then they stay in this position for the rest of their lives.
mobile, the opposite (antonym) is sessile.
An adult feather star is not sessile. It eventually develops arms and is able to move around. Sea lilies are sessile.
Echinoderms, a group that includes starfish, sea urchins, and sea cucumbers, exhibit a range of mobility. While many species, like sea stars, can move slowly using tube feet, others, such as sea cucumbers, can be more sedentary but are not completely sessile. Some echinoderms, like certain sea lilies, are largely attached to the substrate and display a sessile lifestyle. Overall, echinoderms can be both mobile and, to a lesser extent, sessile, depending on the species.
a hydra as a polyp is not sessile but when it grows to be a hydra it is sessile
Benthic sessile organisms are marine organisms that live on the ocean floor and remain attached to a substrate, such as rocks or coral. They do not move around like mobile organisms but instead filter feed or rely on currents to bring them food. Examples of benthic sessile organisms include sponges, corals, and mussels.
Like many other microorganisms, many archeon are capable of moving. They travel through fluids using rod-like structures called flagella. They probably travel across solid surfaces by tumbling, similar to bacteria.
Sessile means attached. So a sessile organism is attached to a substrate.
The two forms of Cnidarians are the Medusoid or mobile form (e.g. Hydra), and the Polyp or sessile form (e.g. Aurelia).
Tapinoma sessile was created in 1917.