ascidian
/əˈsɪdiən/
noun
- A small sea animal that lives attached to rocks or other surfaces and has a simple body shaped like a bag with two openings for water.
- While snorkeling, we saw an ascidian attached to the side of a coral reef.
- Scientists study ascidians because they are related to vertebrates like fish and humans.
- The ascidian filters plankton from the water as it passes through its body.
Synonyms