Largest amphipod crustacean

Amphipods constitute a large zoological order of superficially shrimp-like crustaceans characterised by very pronounced lateral flattening of their bodies, making them appear extremely thin when viewed head-on. Most amphipods are very small, no more than a couple of centimetres long. However, the world's largest species of amphipod is the aptly named supergiant Alicella gigantea, which is known to attain a total length of up to 34 cm. Moreover, living as it does only at very great depths within the Atlantic and Pacific Oceans, it is possible that even larger specimens exist.