I have a 10-11" Male who is not mature at all. I hear keeping them with mature females will make them mature faster though.... Right now he's in a tank with a 13" Motoro female, and 11" Motoro female, and a 9" Marble female. I have another 7" Marble female in a tank by herself right now to fatten her up. Once he matures I'll sell the reg motoros and have him and the 2 Marble females I have in a tank...