A member of the decapoda order; a decapod crustacean.
From decapod with the suffix '-an' (meaning 'one who is' or 'member of'), similar to 'human' from 'homo'. Used both in formal zoology and casual speech.
Every decapodan you've ever eaten at a seafood restaurant had to molt dozens of times before reaching adult size, shedding their entire exoskeleton when they grew too big for it!
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