i saw a video of a black pacu, they look great! was thinking about getting one, but i saw some info on the size it can get 60". some questions i am hoping to get answer. are some pacu illegal? i don't see anyone selling any species of pacu except for red belly. what max size of black pacu in captivity? what is another big pacu species that i can get that is not as big as the black pacu? but say around 24" max.