Sessile

Coral, a sessile animal, relies on its relationship with plant-like algae to build the largest structures of biological origin on Earth.

Corals are sessile animals that "take root" on the ocean floor. It's no wonder that many people think corals are plants!

Corals are sessile, which means that they permanently attach themselves to the ocean floor, essentially "taking root" like most plants do.

The plant produces long spikes covered with tiny, sessile flowers arranged along the central stem.

a sessile oyster

The pileus is sessile, or sometimes narrowed at the base into a short stem, the caps often numerous and crowded together in an overlapping or imbricate manner.

The sporophyte foot is also characteristic: it is very broad and more or less lenticular or disciform, as broad or broader than the calyptra stalk[…], and is sessile on the calyptra base[…]