Scientists studying Amazon river dolphins in Brazil have observed males spraying urine into the air, a ritual for communication.

The weird way dolphins are peeing in the Amazon River is baffling scientists - Mysterious behaviour may be form of ...

Dolphins have pulled off some bizarre stunts, but this one is something else. Picture this: a male Amazon river dolphin swims ...

Like salmon, trout are a type of fish who spend most of their lives at sea but swim up rivers to lay their eggs. Research your local area and find out where the nearest river is to your home.