Our animals

Select zone

Northern lakes and seas

The ocean

Tropical rivers and lakes

Select aquaria

Dwarf mormyrid

Electric eel

Cave tetra

Neon tetra

Arowana

The interesting species of the river

Select species

Select a species to read more


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

Cardinal tetra

Cardinal tetra

Facts

LatinParacheirodon axelrodi
Size3.5 cm
FoodSmall crustaceans, insects and worms
HabitatForest streams and tributaries with dark water
IUCN

Not evaluated

LocationThe Negro and Orinoco basins of the Amazon, 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.

Sponsor of the cardinal tetra


Arapaima

Piranha

Stream aquarium

Under the riverbank

River cichlids

The plants in the river

Angelfish

Armored predators

Discusfish

Veiled chameleon

African river

Archerfish

Endangered species

Lake Tanganyika

Lake Malawi