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Dwarf mormyrid

Electric eel

Cave tetra

Neon tetra

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Philippines crocodile

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Cardinal tetra

Cardinal tetra

Neon tetra

Neon tetra

Green neon tetra

Green neon tetra

Iguazu Pleco

Iguazu Pleco

Florida crayfish

Florida crayfish

Worm line peckoltia

Worm line peckoltia

Neon tetra

Neon tetra

Facts

LatinParacheirodon innesi
Size3 cm
FoodSmall crustaceans, insects and parts of plants
HabitatForest streams and tributaries with dark water
IUCN

Not evaluated

LocationRiver Solimões in the Amazon basin, South America
Map

Reflections in the dark

The beautiful cardinal tetra does not produce light, but it does reflect sunlight with its scales. Although not much sunlight penetrates through the water, this light reflecting is still possible. The cardinal tetra's way of reflecting light can be compared with the way that a cat's eyes light up in the dark.

Colours confuse its enemies

One might think that strong colours that light up would make the cardinal tetra an easy prey. But in a dark stream, the cardinal tetra's colours confuse its enemies. Only the fish's stripes can be seen and not the outline of the fish.


Arapaima

Piranha

Stream aquarium

Under the riverbank

River cichlids

The plants in the river

Angelfish

Armored predators

Discusfish

Poison Frog

African river

Archerfish

Endangered species

Lake Tanganyika

Lake Malawi