I've the possibility to buy S. manueli piranha. There are two specimens for sale in a divided tank. One of them (number 1 on the pics below) is more calm, a little less active but he eats more and catching a smelt quicker. The second one (number 2 on the pics) is very active (the seller says that the fish has ADHD
) and he is constantly attacking a divider trying to get into his neighbour so there is a bump on his chin. He eats less than the number 1 fish. Here are some pics (made by a phone by the seller so sorry for the crappy quality), which one of them would you chose?
The manny number 1:
The manny number 2:
The manny number 1:
The manny number 2: