Pacu fish have surprisingly straight teeth which look eerily similar to human teeth. The Pacu, which is a relative of the piranha, primarily eats fruit, seeds, and nuts and are mostly harmless to people. – WTF Fun Facts
Source: https://number18dental.com/holy-molars-the-fish-with-human-teeth/
Unless you watch “River monsters” and you learn they can feed on a man’s best parts….