DistributionRead full entry
Range DescriptionThis species is endemic to the Cape Verde Islands. C grahami grahami is found only off the eastern extremity of the island of São Vicente at Calhau for a distance of approx 4 km; C grahami luziensis is found only off the south-eastern extremity off the neighbouring island of Santa Luzia at Priai Francisca for a distance of approx 5 km (Monteiro et al. 2004). The two populations are on either side of a channel.