Mine are up to 9 inches and still growing
The tank is a 55g I've had them a bit over 2 years, they were about 3-4 inches when I got them. I assume the big one will push 12 inches eventually. The interesting thing is the biggest one which is 9" and the smallest which is about 5-6 inches were the same size when I caught them. The middle one which is at about 8" was the bigger of the three when I caught them.
It has do with their gender. Males of this species rarely get larger as the females which can easily get up to 12"The tank is a 55g I've had them a bit over 2 years, they were about 3-4 inches when I got them. I assume the big one will push 12 inches eventually. The interesting thing is the biggest one which is 9" and the smallest which is about 5-6 inches were the same size when I caught them. The middle one which is at about 8" was the bigger of the three when I caught them.