ascidian

Definitions of ascidian
1

n minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves

Types:
sea squirt
ascidian that can contract its body and eject streams of water
Type of:
tunicate, urochord, urochordate
primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva

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