The populations of the cichlid fish are different species because they do not naturally interbreed.
The term specie refers to a group of organisms that have the same characteristics and are capable of interbreeding with each other. Members of the same species have the similar genetic makeup.
The question is incomplete, however, we can truly conclude that their are five new species formed because they do not naturally interbreed.
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Cichlid fish had a lineage divergence during their evolution in the lake Nagubago
Patterns of lineage formation can be identified when constructing and examining a phylogeny. Phylogeny may reveal that a particular lineage has undergone unusually frequent speciation, creating a thick tuft of branches on the tree. It may also reveal that the lineage has a low rate of lineage divergence, represented by a long branch with few branches protruding from it. Or it may reveal that several lineages have experienced an “explosion” of divergence at the same time.
With this information, we can conclude that cichlid fish had a lineage divergence during their evolution in Lake Nagubago
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