Alepocephaliformes is an order of marine deep-sea teleost fishes. It was previously classified as the suborder Alepocephaloidei of the order Argentiniformes.

As an adaptation to a life in the deep-sea, they have no swim bladder, and the ossification of the skeleton is reduced. The largest known member is Narcetes shonanmaruae, the largest deep-sea-endemic bony fish.

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