A family of marine animals known as sea squirts or tunicates that thrive in salty ocean environments.
From 'halo-' (salt) + 'cynthia' (genus name) + '-idae' (family suffix in taxonomy). A scientific taxonomic name established in marine biology during the 19th century.
Sea squirts in the Halocynthiidae family are bizarre creatures that start life as tadpole-like larvae swimming freely, then permanently glue themselves to rocks and transform into filter-feeding blobs—they're living fossils that show how weird early animal evolution got.
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