Our animals

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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

Arapaima

Piranha

Stream aquarium

Select species

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Empire gudgeon

Empire gudgeon

Empire gudgeon

Empire gudgeon

Lake Kutubu rainbowfish

Lake Kutubu rainbowfish

Lake Kutubu rainbowfish

Lake Kutubu rainbowfish

Sentani rainbowfish

Sentani rainbowfish

Sentani rainbowfish

Sentani rainbowfish

Red rainbowfish

Red rainbowfish

Yellowspotted hypostomus

Yellowspotted hypostomus

Pictus catfish

Pictus catfish

Xalapa Swordtail

Xalapa Swordtail

Facts

LatinXiphophorus hellerii "Xalapa"
Size14 cm
FoodPlants, algae and bottom-dwelling animals
HabitatRivers
IUCN

Not evaluated

LocationXalapa Mexico
Map

The longest sword The swordtail can be identified by its special caudal fin. The lower part of the caudal fin resembles a sword. Only the male fish has a caudal fin, and this is how to tell the difference between male and female green swordtails. There are many different kinds of swordtails. Some have a very short 'sword', while with others, the 'sword' is just as long as the body. Mates with the sword Males with long 'swords' use them when it is time to mate. The males surround the females either by quickly attacking or pulling backwards with their bodies bent.


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