Pencil cardinal
Encyclopedia
The pencil cardinalfish, Epigonus denticulatus, is a deepwater cardinalfish
Deepwater cardinalfish
Deepwater cardinalfishes are perciform fishes in the family Epigonidae.They are small fishes: the largest species, Epigonus telescopes, reaches 75 cm in length, and most species grow to no more than 20 cm or so....

 of the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Epigonidae, found around the world, at depths of between 130 and 830m. Its length is up to 20 cm.

The pencil cardinalfish and the bulls-eye
Bulls-eye
The bulls-eye or deepsea cardinalfish, Epigonus telescopus, is a deepwater cardinalfish of the family Epigonidae, found in most temperate oceans worldwide, at depths of between 75 and 1,200 m...

 are very similar, except the former has seven spines in the first dorsal fin
Dorsal fin
A dorsal fin is a fin located on the backs of various unrelated marine and freshwater vertebrates, including most fishes, marine mammals , and the ichthyosaurs...

, whereas the latter has eight.
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