This pacu was caught at Sawyer's Pond on Aug. 12. Although it looks very similar to its cousin - piranha - it has very different eating habits. The fish does have teeth, but a pacu eats vegetation, not flesh. The teeth are used to chew plants and crack open nuts, said Evin Oneal from Idaho Department of Fish and Game. This was the third reported pacu caught at Sawyer's this year. Because the fish will not survive a winter in Idaho water, he is uncertain what long-term effect the fish could have on vegetation and native fish that eat vegetation. "This is a bad example of people releasing aquarium fish in the wild," Oneal said.