Lasiognathus, the wolftrap anglerfish, is a genus of deep-sea anglerfish in the family Oneirodidae, with six species known from the Atlantic and Pacific Oceans.

It is distinct from other anglerfish for an enormous upper jaw with premaxillaries that can be folded down to enclose the much shorter lower jaw. Its lure apparatus appears to consist of a "complete" fishing rod; the projecting basal bone or pteropterygium being the rod itself; the illicium, a modified dorsal fin ray) being the fishing line; the bioluminescent esca as bait; and hook-like enlarged dermal denticles).

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