How do you know if a piranha fish is pregnant?

Answer:
Technically they don't get pregnant, they're egg layers and not easy to breed in captivity anyway. If you have one and it's looking chubby, it's more likely to have a gut load of internal parasites or have over-eaten.
First answer by Catcatxx. Last edit by Catcatxx. Contributor trust: 1 [recommend contributor recommended]. Question popularity: 2 [recommend question].