Ipnops vs Tripodfish

Ipnops is a genus of deep-sea fishes belonging to the family Ipnopidae, found in abyssal ocean depths. They are distinguished by their unusual head morphology, where the structures that would typically function as eyes are modified into flat, bioluminescent organs covering the top of their heads. These organs are believed to detect faint light in the darkness, rather than forming images. The fish...

Bathypterois grallator, commonly called the tripodfish, lives near the floor of the deep ocean. Two elongated pelvic fin rays and an extended ray from the lower part of its tail form the supports behind its name. Resting on these structures holds its body above the sediment, where it can face the current and intercept passing small crustaceans and other zooplankton without continuously swimming....