1. An order of crustaceans that have five pairs of walking legs. This group includes shrimps, crabs, and lobsters (typical marine animals). 2 A suborder of Cephalopoda that includes squids and cuttlefish, with eight normal arms and two longer partially retractile arms. The swim actively and prey on other sea animal.

DECAPODA: "Giant squid is the largest decapoda in the sea."

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