And they can look superfunny when using their whiskered moustaches to find food. They're available in sunny oranges and yellows and other colors. If you like red and orange fish, consider the swordtail. But if you do keep these champion jumpers, make sure your aquarium has a secure cover or they'll leap out. Only the males have long, swordlike tails.
Fish use their gills to breathe by taking oxygen out of the water.
The temperature of a fish is the same temperature as the water she lives in.