Piranhas can be found in Tomb Raider III. In India they will let Lara cross a river. In the level Crash Site they are more aggressive and will stop you from doing so. However you can create a diversion to get through anyway.
Naturally they can only be found in the water. They can not be killed. You just have to outrun them.
|Tomb Raider 3/The Lost Artifact Enemies|
|Main:||Baboons · Tigers · Shiva Statues · Cobras · Vultures · Tony · Rattlesnakes · Workers · MP with Club · MP with Gun · MP with Rifle · Orcas · London Goons · Rats · The Damned · Museum Guards · Crows · Scuba Divers · Sophia Leigh · Crocodiles · Tribesman with Spiked Axe · Tribesman with poison-dart gun · Compsognathus · Tyrannosaurus Rex · Velociraptors · Harmless Soldiers · Flamethrower Guys · Dragonflies · Green Lizards · Crawling Mutant Scientists · Standing Mutant Scientists · Piranhas · Puna Boss · Tinnos Monsters · Mark Willard/Willard Mutant|
|The Lost Artifact|| Castle Guards · Highlanders