Argyropelecus bullockii (David, 1943)
Upper Miocene
Monterey Formation
Santa Barbara County, California, USA

Large 56mm hatchetfish on 110mm slab.

Argyropelecus is a genus of hatchetfish known from Atlantic and Pacific Ocean sites dating back to the Oligocene.  Today, oceanic hatchetfishes of this genus frequent warm to temperate waters.

Here is a specimen of a species that has recently come on the market.