 The shrimp and the surface mucus layer and eggs of the catfish contain carotenoid pigments that appear to be the source of the sharks' golden color; whether the pigments in the catfish also ultimately come from the shrimp is uncertain.Another shark species in the region, the yellow smooth-hound ("Mustelus higmani"), also feeds on shrimp and has a yellowish color, albeit not nearly as bright.This species has also been known to consume swimming crabs, squid, grunts, and newborn scalloped hammerheads.