The arrowtooth flounder (Atheresthes stomas) is a fish in the family Pleuronectidae.

It can be caught from the Bering Sea to Santa Rosa Island, California.

Data is insufficient for many of the flounder's general traits, including size and age of sexual maturity.

[2] Spawning is known to occur from December through February and the species can live up to 27 years.

[3] If not properly handled, the flesh of an arrowtooth flounder can soften, due to a proteolytic enzyme which is emitted from a myxosporean parasite that softens the flesh when heated, lowering value and marketability.