Red bellied pacus are not aggressive fish and, though they prefer to be kept with others of their own species, they can be kept with other fish. ... It is also important to remember that, though pacus are not carnivorous, they still have very powerful jaws so you need to exercise extreme caution around these fish.

Do pacu eat other fish?

Pacus primarily eat plants and are considered mostly harmless to people, despite their kinship with piranhas. But they do occasionally eat other fish and can potentially outcompete native species or spread parasites or disease.

How big do pacu fish get?

Pacu can reach 3 feet in length and weigh over 65 pounds. Red hook pacu live in the upper Amazon River basin in South America.