Deep in a cave in Zaire lives a small, blind fish, while deep in shady forest streams in Sri Lanka lives a beautiful, cherry-colored jewel-like fish. Their whiskers tell scientists that they are cousins.
The whiskers—known as barbels—are not the only features that link the blind cave barb and the cherry barb.They share other similarities, not just between them, but with several hundred other species that form a group of mostly small fish known as barbs. Scientists do not all agree about which fish should be called barbs. The largest barb
