two are about 8" one is around 12". I feed then a wide range of foods Frozen blood worms ; Shrimp pellets; cichlid sticks; cichlid flakes; tublfix worms; catfish floating pellets; ghost shrimp ( don't know how many they get due to the blood parrots I have in the tank); etc. Their tankmates are the following: 2 clawed frogs; 5 blood parrots; 1 female Flowerhorn and a Jack Dempsey. tempture of the tank stays around the low 80's.