Perch Anatomy

Maxilla: upper jaw

Mandibles: lower jaw

Operculum: covers gills

Gills: gas exchange

Pectoral fins: maneuver and stabalize in the water, by operculum

Pelvic fins: stabalization

Anal fin: stabalization

Urogenital opening

Lateral line: used for vibration

Dorsal fin: on top, bony

Anterior dorsal fin: helps keep fish upright

swim bladder: balloon like structure, used for buoyancy, inflated/deflated with gases

Gonad: 2 testes (white) in the male, 1 ovary in female (orange)

Liver: large glandular structure directly anterior to the heart

Stomach: anterior to liver, turns into intestine

Pyloric caeca: projections on stomach to increase surface area