Just the words “East African Rift Lake” convey sufficient magic to attract the attention of those that have never even heard of cichlids. Imagine a body of water as large as the state of Maryland, filled with crystal clear water — fresh water — and teeming with millions of gaudily-colored fishes. Just like a coral reef without the salt water, the currents, and the tides. And Africa has two such lakes, both about the same size and both with a unique set of fishes, almost all of them found...