A territory with fins
On the sandy floor of Lake Malawi, a large sand-sifting cichlid drives its snout into the bottom. Sand pours from its gills and small animals become exposed. Following close behind is a Blue Dolphin.
Cyrtocara moorii lets the larger fish do the excavation, then collects food from the disturbed sediment. Once attached to a productive host, it may drive away other followers. Its territory is not a fixed place. Its territory swims.
One specimen, one genus
George Albert Boulenger described the species in 1902 from a single preserved fish collected by J. E. S. Moore. He created both the species and the genus Cyrtocara. After a period in Haplochromis, later anatomical work restored Boulenger’s genus.
Cyrtocara remains monotypic. The Blue Dolphin is not one of many nearly identical species in a large genus; it is the only recognized species carrying that name.
Vulnerable in the lake, renewable on the farm
Older profiles often repeat a Least Concern status. The 2018 IUCN assessment lists C. moorii as Vulnerable. Shallow sandy habitat is accessible to heavy fishing, and specialists had warned of local depletion before the formal category changed.
Every captive-bred Blue Dolphin is one the aquarium hobby does not need to remove from Lake Malawi. Fish farming cannot regulate the lake, but it can stop asking the lake to replace every fish we admire. That is not the whole conservation answer. It is a real part of it.