Overview

Comprehensive Description

Biology

A voracious species. Inhabits calm waters. In nature, it feeds mainly on zooplankton but it also consume plants, worms, insects and crustaceans (Ref. 7020). An adult female produces around 2,000 eggs which is incubated for a period of 50 to 70 hours. After the third day, the fish search actively for food (Ref. 12225).
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Distribution

South America: Orinoco River basin and coastal river basins of Guyana, Suriname and French Guiana.
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Orinoco River basin and coastal river basins of northern South America: French Guiana, Guyana, Suriname and Venezuela.
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Physical Description

Size

Maximum size: 90 mm ---
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Max. size

8.0 cm SL (male/unsexed; (Ref. 38376))
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Ecology

Habitat

Environment

pelagic; freshwater
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Trophic Strategy

Is a voracious species. Inhabits calm waters. In nature, it feeds mainly on zooplankton but it also consume plants, worms insects and crustaceans.
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Relevance to Humans and Ecosystems

Benefits

Importance

aquarium: commercial
  • Mills, D. and G. Vevers 1989 The Tetra encyclopedia of freshwater tropical aquarium fishes. Tetra Press, New Jersey. 208 p. (Ref. 7020)
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Wikipedia

Ctenobrycon spilurus


Ctenobrycon spilurus, the silver tetra, comes from French Guiana, Guyana, Suriname and Venezuela. It is native to the Orinoco River basin as well as coastal river basins of Suriname, Guyana, and French Guiana.

Description[edit]

The silver tetra is almost disc shaped. It is mainly silver in color, but there is a slight olive green cast to some of these fish.

The eyes are large. There is some black at the base of their tail fin. Some have a small dark spot near their gill covers. The dorsal fin is fairly short. There is a variable amount of red in the fins under the fish. This fish can reach 10 centimeters in length.

Nutrition[edit]

The silver tetra is an omnivore in the wild eating plants as well as worms, insects and crustaceans. In the aquarium they will eat aquarium plants, especially if insufficient vegetable matter is included in their diet.

Water Conditions[edit]

A large aquarium is needed for this large tetra. A pH of 6.5-7.5, hardness of up to 20 degrees of general hardness and a temperature of 20-26 degrees C is suitable.

Conservation Status[edit]

The IUCN Red list has not evaluated threats to this species.

Sources[edit]

Fishbase: http://www.fishbase.org/summary/speciessummary.php?id=10629

IUCN Red list: http://www.iucnredlist.org/apps/redlist/search

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