Cochu's blue tetra
Encyclopedia
The Cochu's blue tetra or blue tetra, Boehlkea fredcochui, is a species of characin. Its natural range
Range (biology)
In biology, the range or distribution of a species is the geographical area within which that species can be found. Within that range, dispersion is variation in local density.The term is often qualified:...

 is in the Amazon Basin
Amazon Basin
The Amazon Basin is the part of South America drained by the Amazon River and its tributaries that drains an area of about , or roughly 40 percent of South America. The basin is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, and Venezuela...

. It is commonly kept as an aquarium
Aquarium
An aquarium is a vivarium consisting of at least one transparent side in which water-dwelling plants or animals are kept. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, marine mammals, turtles, and aquatic plants...

 fish.

Aquarium Care

  • Maximum length: 5.5 cm
  • Colors: Blue, pink
  • Temperature preference: 22-27 celsius
  • pH preference: 6 to 7.5
  • Hardness preference: Soft to medium (less than 15ºd)
  • Salinity preference: No salt
  • Compatibility: Generally peaceful, may nip fins during feeding or when stressed
  • Life span: Typically 2 to 3 years
  • Ease of keeping: Easy
  • Ease of breeding: Moderate to hard


As for other schooling characins, the blue tetra should always be kept in groups of at least 6. A very active fish, it requires open areas in which to swim and is best kept in aquariums 90 cm or larger. Aggression is generally limited to conspecifics in appropriate setups, but they may harass other fish in too small a tank, or without enough other tetras.

Spawning may occur in home setups, with the eggs
Egg (biology)
An egg is an organic vessel in which an embryo first begins to develop. In most birds, reptiles, insects, molluscs, fish, and monotremes, an egg is the zygote, resulting from fertilization of the ovum, which is expelled from the body and permitted to develop outside the body until the developing...

 being scattered over fine leafed plants. Soft, acidic water is required for hatching to occur. Males may be differentiated from females by their slimmer, more streamlined form and more intense colouration.
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