Ichthyococcus

Ichthyococcus, the fireflyfishes, is a genus of deep-sea stomiiform fish. It is the only member of the family Ichthyococcidae.

Included species

There are currently seven recognized species in this genus:

Members of this family were formerly placed in the family Phosichthyidae, but a 2025 phylogenetic study found the latter family to be paraphyletic as previously described. Ichthyococcus was found to belong to a distinct lineage sister to the clade containing the Phosichthyidae and Stomiidae, and was thus described as its own family, the Ichthyococcidae.