The convict julie (Julidochromis regani) is a cichlid species in the subfamily Pseudocrenilabrinae family endemic to Lake Tanganyika. Hence it is found in Burundi, the Democratic Republic of the Congo, Tanzania, and Zambia. The fish is named after Charles Tate Regan. This species is closely related to Julidochromis marlieri. Possibly, a male common ancestor of these two hybridised with some female Telmatochromis ancestor in their evolutionary past.