EVERYDAY SCIENCE

Detailed explanation-1: -All adult sponges are sessile, meaning they live permanently attached to rocks or other submerged objects and do not move about on their own. Some sponges grow in thin encrusting layers over surfaces (Fig. 3.18 A). A few species can even bore into hard surfaces like clam shells, coral skeletons, and rock (Fig.

Detailed explanation-2: -Sessile animals such as sponges, corals, and anemones attach themselves to the bottom or substrate. This sessile lifestyle is advantageous to these organisms, because they do not have to expend large amounts of energy to move through the water to get food.

Detailed explanation-3: -permanently attached to a substrate; not free to move about. “sessile marine animals and plants” Antonyms: vagile. having freedom to move about.

Detailed explanation-4: -In zoology, sessile animals are those which are not able to move about. They are usually permanently attached to a solid substrate of some kind, such as a rock, or the hull of a ship in the case of barnacles. Corals lay down their own substrate. Sessile animals typically have a motile phase in their development.

Detailed explanation-5: -The term sessile refers to an organism that is anchored to a substrate and cannot move about freely.