|Two-rod anglerfish, Diceratias bispinosus|
They are easily distinguished from other anglerfishes by their possession of a second light-bearing dorsal fin spine immediately behind the illicium (the bioluminescent lure present in other anglerfishes).
As in other anglerfishes, the male is very much smaller than the female, and after a larval and adolescent free-living stage, spends the rest of his life parasitically attached to a female.
The first specimen of the two-rod anglerfish (first called Ceratias bispinosus) was collected during the expedition of the HMS Challenger during 1873-1876. It was first described by Albert Günther in 1887 in volume 22 of "Report on the deep-sea fishes collected by H. M. S. Challenger during the years 1873-76. Report on the Scientific Results of the Voyage of ADD" 
The six species in two genera are:
- Genus Bufoceratias
- Genus Diceratias
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