Aristostomias is a genus of barbeled dragonfishes native to the ocean depths in the Pacific, Atlantic and Indian oceans.

[1] Similar to other deep-sea organisms that are capable of producing red light bioluminescence, including Pachystomias, Aristostomias has large suborbital photophores that produce red-shifted cold light.

[2] In addition, Aristostomias has postorbital photophores that emit blue-green light.

[3] Most meso- and bathypelagic fish are only able to see shortwave light, as their retinae possess rods with rhodopsins sensitive to blue light.

[4] Aristostomias is able to detect red-shifted light, as their retinae have long-wave absorbing rhodopsins and porphyropsins that can detect wavelengths of up to 590 nm.