Labeotropheus trewavasae ''Red Top'' There are more than forty geographic and color variants of Labeotropheus trewavasae in Lake Malawi. This Red Top Trewavasae, the males are blue with red top and the females are orange ob..This fish is often included in the prestige mix. It is important to include spirulina ( Bluegrass Aquatics All Purpose Fish Food Formula) in this sensitive herbivores diet. size 1.25 - 2.25 inches We have fed the All Purpose Fish Food Formula in our Florida Facility for over a year. Our cichlids are noticeably more active, grow quicker, have improved color, and we have all but eliminated bloat in even the most sensitive species, including tropheus.