This is a bag of 6 fish 2"-21/2" long Masked Julies. They are a VERY peaceful African Cichlid. I've had them spawn in community tanks that had smaller and/or larger fish and nobody was the worse for the it. I've had some spawn in a tank that has Angelfish (silver dollar size) and Rainbowfish in it and they are all getting along-3 different sizes of fry. They are a cave dweller, they may try to dig one if one isn't provided.