Aggressive piranhas bark to say buzz off
Thursday, October 13, 2011 - 08:30
in Earth & Climate
Piranhas are best known for their bite, but did you know they make sounds too? A team of researchers knew that piranhas could produce at least one sound, but they didn't know when and why the fish become vocal. Filming and recording sounds produced by piranhas competing for food, they found that the fearsome fish have a repertoire of three sounds to threaten competitors.