citras were created by bioengineers to discover genetic traits linked to homosexuality. To that end, 90% of them are homosexual males; the rest, both male and female, were used to propagate the species and were known as "citruses." Threatened with extermination, they escaped the facility and now live in the wild. From a description of one of the works: "The citras are useful in providing entertainment to nearby civilized units, and are paid in physical resources."

Citras and citruses are, overall, similar in appearance to the fennec fox, with long, pointed ears and a bushy tail. They vary in size but are typically smaller than the standard-sized anthro character. As they grow up, they turn the color of the type of citrus fruit they eat. Distinctive markings of all citras and citruses include a light patch around their right eye, darker fur on the lower arms, feet, and forepaws, lighter underparts, and two dark rings around the tail.

copy+pasta from WikiFur ^^

Aren't they adorable? :3