An example of animals in freshwater are piranha, tiger fish,Nile crocodile, and vampire fish
ADAPTATIONS For example the Hawaiian fresh water fish have pelvic sucking disc to help them attach to rocks and hard surfaces in order to withstand very strong tidal movements. This helps these fish so that they don't get pushed away or even hurt by the tidal movements. They also have strong fins to swim against currents. this helps these fish so that they can find and get more food.