I have 4 in my 75g tank with 2 Red tiger Motas. I have noticed the last couple of days that my "Boss Hog", and biggest fish, the female RT Mota has been hiding and on the opposite side of the tank is my Male Dovii with one of the smaller females. He is guarding that side of the tank keeping everyone away. The Dovii pair also have gravel cleared to the point that all you can see is the bottom of the tank. My male is about 4.5-5" and the female maybe 4" max. Are they big enough to spawn? On a previous post I listed my Jags are doing the same thing. The male Jag came from this tank.