Just found this forum and hopefully can get some help. We've had 3 Severum's in our 125 gallon tank for years now. 2 Green and 1 Gold. We've noticed lately that the biggest Green has been staying with the Gold in one corner of the tank. If the smaller Green comes near them, the bigger one goes after him... Same with 2 of our Dalmation Catfish. If they go to that corner, both Severum's will attack them. Is there a way to find out what sex they all are? They used to swim together and had no problems. I've attached pictures of all 3. Hope I did it right. The bigger Green has the yellow eyes and the colored bottom, the smaller Green is all dark and no other color.
