Species of ray-finned fish

The clown featherback, clown knifefish, or spotted knifefish, Chitala ornata, is a nocturnal tropical fish with a retentive, knife-like body. This knifefish is native to freshwater habitats in Cambodia, Laos, Thailand, and Vietnam, [ 2 ] but it has besides been introduced to regions outside its native range. [ 1 ] It is one of the world ‘s most invasive species. It is often seen in aquaculture and the aquarium trade, where it is frequently confused with Chitala chitala ; the latter species is very rare in the aquarium trade. [ 3 ] [ 4 ] The clown featherback reaches 1 thousand ( 3.3 foot ) in length, [ 2 ] outgrowing all but the largest aquarium, yet it is popular. [ 3 ]

distribution [edit ]

This species is native to Cambodia, Laos, Thailand, and Vietnam, where found in the Mekong, Chao Phraya, and Meklong River basins. [ 2 ] It has besides been introduced to regions outside its native rate, including the Philippines, Indonesia, Myanmar, Singapore, Sri Lanka, Malaysia and Palm Beach County, Florida, United States. [ 1 ] [ 3 ] It has either spread to or was introduced to Broward County, Florida. [ 5 ]

appearance [edit ]

Aquarium specimen showing the small, ocellated spots on the lower back body ( towards the “ stern ” ) that are typical of adults The clown knifefish is identical distinct, with normally silvern gray with a retentive, knife-like torso ( laterally compressed ) and a long anal fin that gives it its common name. Mature pisces normally have five to 10 ( or even more ) black spots ringed with blank that normally decrease in size as the pisces grows. These ocellated spots and the miss of faint stripes on the back discriminate it from Chitala chitala ; a species with which it frequently has been confused. [ 3 ] [ 6 ] Albinos and leucistic specimens are seen with some frequency in the aquarium trade. [ 3 ] Juveniles lack the spots, but are overall striped. Their long anal fins are used to make graceful forth and backward movements. The clown knifefish grows to a reasonably large size, up to 1 molarity ( 3.3 foot ) and 5 kilogram ( 11 pound ) in the wilderness. [ 2 ] It has two adenoidal tentacles above its large, toothed sass. In the center of the body is a flag-like abaxial fin and has no ventral fins .

demeanor [edit ]

They are nocturnal and normally cruise during the twilight hours. They normally hunt populate prey and try any fish that fits into their mouths. Young clown knifefish normally school near water logs and plants for security, whereas more fledged specimens normally become territorial and finally become loners. These pisces can besides breathe publicize to survive in dead waters and short oxygen. The clown knifefish prefers water around neutral ph and temperatures ranging from 75 to 85 °F ( 24 to 29 °C ). These pisces normally are found in lakes, swamps, and river backwaters.

In the aquarium [edit ]

clown knifefish are sold as alien fish in pet stores, but they grow much besides large for the average dwelling aquarium. These fish have periods of retreat, so aquaria that have caves, plants, or other hide places are preferred. They are jumpers, so the hat should be kept tightly closed. Dim light may help lessen startle. For the first base few days, clown knifefish are shy and prone to hiding. As they grow larger, they tend to be quite the inverse .

Feeding [edit ]

clown knifefish are hearty eaters, and will take live foods such as bird feeder fish, ghost shrimp, and blackworms. With time, they can be adapted to foods such as beefheart and will sometimes learn to accept commercial food pellets. They are by and large nocturnal, thus prefer feeding when the lights are off .

As food [edit ]

The clown featherback is normally seen in the cuisine of Thailand and other Southeast asian countries. In Thailand, when french-fry as pla krai thot krathiam ( ปลากรายทอดกระเทียม ), it is served with a blue dipping sauce on the english made by mashing up coriander roots, boo ‘s center chillies, and garlic, and mixing this with fish sauce, linden juice, and carbohydrate. The clown featherback is besides the chief fish used in the production of fish balls .

pornographic in the market in Chiang Rai, Thailand pla krai with garlic Deep-friedwith garlic

Chitala ornata naem small bungalow industry gain

See besides [edit ]

References [edit ]

  • http://www.myfwc.com/WILDLIFEHABITATS/Nonnative_FW_ClownKnifefish.htm – accessed October 2006
  • http://badmanstropicalfish.com/profiles/profile5.html – accessed October 2006
  • http://www.aqualandpetsplus.com/Knife,%20Clown.htm
  • Media related to Chitala ornata at Wikimedia Commons