Marine hatchetfishes (deep-sea hatchetfishes) are small deep-sea mesopelagic ray-finned fish of the stomiiform subfamily Sternoptychina and are in no way associated with the freshwater hatchetfishes. Marine Hatchetfishes are found in the tropic/subtropic waters of the Atlantic, Pacific and Indian Ocean. Ranging in size from reasonably small to generally large,They are deep-sea fishes which have evolved a peculiar body shape and like their relatives have bioluminescent photophores which allow them to use counterillumination to escape predators that lurk in the deep parts of the ocean. Their large tube-shaped eyes can collect the faintest of light and focus well on objects both near and far.










