Parrot seaperch

The parrot seaperch has a slender body in which the depth fits into the standard length 3 times. The dorsal fin is typically supported by 11 spines and 10 or 11 soft rays, with the soft-rayed part being taller than the spiny part. The anal fin is supported by 3 spines and 9 or 10 soft rays. The pelvic fins are short, while the pectoral fins typically have 20 or 21 fin rays and the caudal fin is lunate. In fishes with a standard length greater than 13 cm (5.1 in) the lobes of the caudal fin have filamentous elongations to the lobes. It has an incomplete lateral line which ends just to the rear of the base of the dorsal fin. The body is largely red and the fins are yellow but the colour can vary with photographs showing yellow longitudinal stripes or white overall body colour with two broad pink bars below the lateral line. Other photographs show individuals with a patch of yellow colour on the head and upper body. This species has a maximum published total length of 60 cm (24 in).

The parrot seaperch is found in the eastern Atlantic Ocean where its distribution extends from the English Channel, where it is infrequently recorded south to Mauritania, including the Macaronesian Islands and the Great Meteor Seamount, and throughout the Mediterranean Sea. It is found at depths between 50 and 500 m (160 and 1,640 ft) over rocks and mud and in undersea caves.

The parrot seaperch has the specific name ruber meaning "red" and Rafinesque described the fish as having a "spotless red body" and red is one of the dominant colours of this species.