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from The Telegraph


Potamotrygon Leopoldi: The Polka Dot Ray is a species of fish in the Potamotrygonidae family. It is endemic to Brazil. Its natural habitat is rivers. It is threatened by habitat loss.


Bala Shark, (Balantiocheilus melanopterus) Species Profile, Bala Shark, (Balantiocheilus melanopterus) Care Instructions, Bala Shark, (Balantiocheilus melanopterus) Feeding and more.  ::  Aquarium


Rainbow Shark, (Epalzeorhynchos frenatus) Species Profile, Rainbow Shark, (Epalzeorhynchos frenatus) Care Instructions, Rainbow Shark, (Epal...

The red-tailed shark (Epalzeorhynchos bicolor). A striking fish. These get to 4". Are peaceful to other fishes when small, but semi-aggressive as adults. Should be kept with fishes of similar temperament. One specimen per tank or in schools of 8 or more; otherwise, weaker individuals get picked to death by the dominant individual.

from Mail Online

Incredible photographs show a school of fish forming a 'tornado'

A school of fish together in the Cabo Pulmo marine protected area in Baja California...