Cyclothone

Cyclothone
Veiled Anglemouth (C. microdon)
Tan Bristlemouth (C. pallida)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Stomiiformes
Family:	Gonostomatidae
Genus:	Cyclothone Goode & T. H. Bean, 1883

Cyclothone is a genus of bioluminescent bristlemouths which typically grow to around 3 inches (though some species are known to be larger). They are most commonly found at depths exceeding 1000 feet.

The genus is believed to be more abundant than any other vertebrate genus on Earth, numbering up to quadrillion individuals.

There are currently 13 recognized extant and one extinct species in this genus:

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Wikipedia