Lophotiformes

Lophotiformes is an order of marine ray-finned fishes that includes the ribbonfish and their close relatives. These fishes are characterized by their elongated, ribbon-like bodies and are found in oceans worldwide, typically inhabiting mesopelagic and bathypelagic zones. They are known for their distinctive appearance, with most species having a long dorsal fin that runs the entire length of their body, often fringed with bioluminescent organs.

The Lophotiformes are a relatively small order, with only a few families and genera represented. The most well-known families are the Lophotidae (the crestfishes) and the Trachipteridae (the ribbonfishes). Crestfishes are distinguished by a prominent, fan-like crest on their head, while ribbonfishes lack this feature but possess a similar elongated body shape.

These deep-sea dwellers are generally solitary and rarely observed. Their diet consists primarily of small crustaceans and other planktonic organisms, which they capture using their small mouths and protrusible jaws. Reproduction and life cycle details for many Lophotiformes species remain poorly understood due to their elusive nature and habitat. Their ecological role in the deep-sea food web is thought to be that of a predator on smaller organisms, and they themselves may be prey for larger deep-sea predators. Despite their infrequent sightings, their unique adaptations to the deep ocean make them a fascinating group within marine ichthyology.