Abstract
Despite numerous anomalies that have been reported for many species of fishes, records on deep-water species are scarce and apparently very rare for luminescent organs (i.e., photophores). In presently reported study, we described and illustrated anomalies in the number and placement of primary light organs in three lanternfish species: the Mexican lampfish, Triphoturus mexicanus (Gilbert, 1890); the highseas lampfish, Triphoturus nigrescens (Brauer, 1904); and the popeye lampfish, Bolinichthys longipes (Brauer, 1906), collected off the Pacific coast of Mexico.
Highlights
Despite numerous anomalies that have been reported for many species of fishes, records on deep-water species are scarce and apparently very rare for luminescent organs
The family Myctophidae or lanternfishes, include more than two hundred fifty species (Froese and Pauly 2016), many of which live in the mid-water zone of the tropical and subtropical temperate oceans
Several morphological characters are helpful in distinguishing lanternfish genera and species, but their primary light organs and their number, arrangement, and size are by far the most useful
Summary
Despite numerous anomalies that have been reported for many species of fishes, records on deep-water species are scarce and apparently very rare for luminescent organs (i.e., photophores). Five percent of the living species of rayfinned fishes have some type of light organs (Davis et al 2016, Nelson et al 2016).
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