Monrovia slugs are omnivorous fish, feeding primarily on zooplankton, phytoplankton, and organic detritus. After understanding what food Monrovia eats, let's introduce its morphological characteristics.

Monrovia fish is oval in shape and flat on the side, with a small head, and the outline of the head and back is not particularly protruding. Adults are bluish-gray reddish, with dark brown dorsal and anal fins, with dark yellow bands at the base. There is an oval orange-yellow spot on the caudal peduncle, the tail spine is dark brown, the caudal fin is blue-gray, and the end has a black spot. The pectoral fins are orange-yellow with dark margins, and the pelvic fins are dark brown.