Hemibagrus wyckii

Crystal-eyed catfish
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Bagridae
Genus:	Hemibagrus
Species:	H. wyckii
Binomial name
	Hemibagrus wyckii; (Bleeker, 1858)
Synonyms
	Bagrus wyckii Bleeker 1858; Macrones wyckii (Bleeker, 1858); Mystus wyckii (Bleeker, 1858);

Hemibagrus wyckii is a species of catfish (order Siluriformes) of the family Bagridae. It is occasionally called the crystal-eyed catfish.[1]

Distribution

This species originates in Asia from Thailand to Indonesia.[2] It is known from the Mekong and Chao Phraya drainages in central Indochina. It is also known from the Batang Hari and Musi River drainages in Sumatra, the Pahang River drainage in Peninsular Malaysia, the Citarum drainage in Java, and the Baram, Rejang, Kapuas, and Barito River drainages in Borneo.[3]

Appearance and anatomy

Hemibagrus wyckii are black with a few white markings on the caudal and dorsal fins, and the eyes are sky blue.[4] They reach about 71 centimetres (28 in) SL.[2] The head is extremely depressed and broad. The caudal fin is dark grey. The dorsal fin spine has 10–12 serrations on the posterior edge.[3]

Hemibagrus wyckii bears a resemblance to H. wyckioides, however H. wyckioides lacks serrations on the dorsal fin spine, has a shorter dorsal fin base, and shorter maxillary barbels.[3]

Ecology

Hemibagrus wyckii appears to be restricted in the middle reaches of the large rivers it inhabits.[2] This species feeds on insects, prawns and fishes.[2] These fish are aggressive and can attack animals of their own size; they have been claimed to be the "only freshwater fish unafraid of man".[1][4]

Relationship to humans

This fish is marketed fresh as a food fish.[2] Hemibagrus are aquacultured in Asian countries.[4]

Hemibagrus wyckii and Hemibagrus wyckioides are the two members of this genus imported as aquarium fish.[4] These fish will bite and can damage objects in the aquarium.[1] Due to both its aggressive and its predatory nature, this species should be kept alone.[1]

gollark: Which we also can't do. How smart

gollark: DROP!

gollark: ~~TJ09 should just remove sickness already~~

gollark: There must be thousands.

gollark: I wonder how they got the codes for them though?

References

"PlanetCatfish::Catfish of the Month::December 2002". 2006-08-10. Retrieved 2007-05-18.
Froese, Rainer and Pauly, Daniel, eds. (2007). "Hemibagrus wyckii" in FishBase. May 2007 version.
Ng, Heok Hee; Rainboth, Walter, J. (1999). "The Bagrid Catfish Genus Hemibagrus (Teleostei: Siluriformes) in Central Indochina with a New Species from the Mekong River" (PDF). The Raffles Bulletin of Zoology. 47 (2): 555–576.CS1 maint: multiple names: authors list (link)
Linder, R. Shane (June 2000). "The Catfishes of Asia Family Bagridae part two" (PDF). Cat Chat. 1 (2). Archived from the original (PDF) on 2007-08-20.

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[planetcatfish-1] "PlanetCatfish::Catfish of the Month::December 2002". 2006-08-10. Retrieved 2007-05-18.

[fishbase-2] Froese, Rainer and Pauly, Daniel, eds. (2007). "Hemibagrus wyckii" in FishBase. May 2007 version.

[ng-3] Ng, Heok Hee; Rainboth, Walter, J. (1999). "The Bagrid Catfish Genus Hemibagrus (Teleostei: Siluriformes) in Central Indochina with a New Species from the Mekong River" (PDF). The Raffles Bulletin of Zoology. 47 (2): 555–576.CS1 maint: multiple names: authors list (link)

[csg-4] Linder, R. Shane (June 2000). "The Catfishes of Asia Family Bagridae part two" (PDF). Cat Chat. 1 (2). Archived from the original (PDF) on 2007-08-20.