Crestfish

Crestfishes, family Lophotidae, are lampriform fishes found in most oceans.[5] It consists of two extant[5][6] and four extinct genera.[1]

Crestfishes
North Pacific crestfish
Lophotus capellei
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Lampriformes
Family: Lophotidae
Genera

Eumecichthys
Lophotus
†Babelichthys[1]
†Eolophotes[2]
†Protolophotus[3]
†Oligolophotes[4]

They are elongated, ribbon-like fishes, silver in color, found in deep tropical and subtropical waters worldwide. Their scientific name is from Greek lophos meaning "crest" and refer to the crest (part of the dorsal fin) that emerges from the snout and head; this structure gives them their other name of unicorn fishes.

The extant genera all possess ink sacs that open into their cloacae from which they can produce a cloud of black ink when threatened (as in many cephalopods).[7]

References
  1. Davesne, D. (2017). "A fossil unicorn crestfish (Teleostei, Lampridiformes, Lophotidae) from the Eocene of Iran". PeerJ. 5: e3381. doi:10.7717/peerj.3381. PMC 5493034. PMID 28674642.
  2. Daniltshenko, P. G. (1980). "Iskopayemyye kostistyye ryby SSSR [Fossil bony fishes of the USSR]". Trudy Paleontologicheskogo Instituta, Akademiya Nauk CCCP. 178.
  3. Walters, V. (1957). "Protolophotus, a new genus of allotriognath fish from the Oligocene of Iran". Copeia. 1 (1): 60–61. doi:10.2307/1440530. JSTOR 1440530.
  4. Bannikov, A. F. (1999). "A review of fossil Lampridiformes (Teleostei) finds with a description of a new Lophotidae genus and species from the Oligocene of the northern Caucasus". Paleontological Journal. 33: 68–76.
  5. Froese, Rainer, and Daniel Pauly, eds. (2014). "Lophotidae" in FishBase. November 2014 version.
  6. Nelson, J. S. (2006). Fishes of the World (4 ed.). Hoboken, NJ: John Wiley & Sons. p. 229. ISBN 978-0-471-25031-9.
  7. Honma, Yoshiharu; Ushiki, Tatsuo; Takeda, Masaei (Feb 1999). "Histology of the ink tube and its associated organs in a unicornfish, Eumecichthys fiskii (Lampridiformes)". Ichthyological Research. 46 (1): 19–25. doi:10.1007/BF02674944. S2CID 25284408.


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