Serranus flaviventris

Common Name

Twinspot Bass

Year Described

Cuvier, 1829


Dorsal Fin: X, 12-13
Anal Fin: III, 6-8
Pelvic Fin: I, 5
Pectoral Fin: 16-17
Lateral Line Scales: 39-44
Gill Rakers: 15-18
Vertebrae: 10 precaudal, 14 caudal; 24 total

Serranus defined by Robins & Starck (1961) with the following set of characters. Supramaxilla absent. Maxilla not covered by lachrymal. Premaxillary with a dorsal expansion. Teeth present on dentary, premaxilla, vomer, and palatine. Preopercle serrated. Opercle with three spines. Dorsal fin continuous. Caudal fin with 17 principal rays. Branchiostegal rays number 7. Snout, jaw area, and brachiostegal area naked. Scales encroach on bases of median fin membranes. Lateral line arched and continuous.


Body pale brown with dark brown markings on each scale forming a densely speckled or reticulated pattern. Head pale brown with brown to orange spotting. Two dark brown stripes on head: one runs from snout through eye to midbody and the other runs from the top of head to mid-body under dorsal fin. Belly with a large pearly white blotch. Dorsal fin pale with rows of brown to bright orange spots. There are three distinct black blotches on the dorsal fin: one between spines 3-6, one on the anterior soft dorsal fin, and one on the lower rear soft dorsal fin. Caudal fin with brown to orange spots along rays and two distinctive black spots at the base. Anal fin with orange spots. Pelvic fin pale with a black streak. Eye golden with an orange ring.


Robins, C.R. & W.A., Starck II. 1961. Materials for a revision of Serranus and related fish genera. Proceedings of the Academy of Natural Sciences of Philadelphia v. 113 (no. 11): 259-314.