tunicate larvae but retain this larval shape when they become adult.
They look like tunicate larvae but retain this larval shape when they become adult.
Over the ocean surface, as well as at various depths, float and swim innumerable Hyperiidea - the wonderful Phronima, glass-like in its glassy barrel hollowed out of some Tunicate; the Cystisoma, 4 or 5 in.
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