A plural or collective term relating to ascidia, small marine organisms that look like sacs.
From Latin 'ascidium' meaning a small bag or bladder, derived from Greek 'askos' (wineskin), referring to the pouch-like shape of these creatures.
Sea squirts (ascidia) are some of the ocean's strangest creatures—they're actually distant cousins of humans because they have a notochord (proto-spine) as tadpole larvae, making them early ancestors of all backboned animals!
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