The bighead searsid (Holtbyrnia anomala) is a species of tubeshoulder fish.

[2][3] It maximum length is 25 cm (9.8 in).

[4] Its head is large, making up over a third of the fish's length.

[6] Its photophores are rudimentary (except for the shoulder organ), hence its specific name anomala ("unusual").

[7][8][9] The bighead searsid lives in the North Atlantic Ocean; it is a mesopelagic fish, living at depths of 700–2,000 m (2,300–6,600 ft).