Sarpa Salpa

The Sarpa salpa, commonly known as salema porgy or dreamfish, is a schooling sparid widespread across the Mediterranean Sea and the eastern Atlantic from the Bay of Biscay to South Africa. It is one of the few truly herbivorous seabream, using a specialized gut and comb-like teeth to graze algae and seagrass. Schools of salema are a familiar sight over rocky reefs, harbor pilings, and Posidonia meadows in shallow coastal water. The species has a long history of folklore attached to it because certain individuals, likely after feeding on specific phytoplankton, have historically been linked to unusual sensory effects in people, giving rise to the "dreamfish" nickname. Ecologically it plays an important grazing role, helping control algal growth on reef substrates alongside parrotfish and other herbivorous species in warm-temperate systems.

Look for a deep-bodied but streamlined sparid with 10 to 12 continuous golden-yellow horizontal stripes running the length of a silvery-grey body.

• Single long dorsal fin with sharp spines
• Forked, yellow-tinged tail fin
• Small terminal mouth with flattened incisor teeth for grazing
• Faint dusky blotch above the pectoral fin base It can be confused with the bogue (Boops boops), but bogue lacks the bold gold stripes and has a more silvery, unstriped flank with larger eyes. Juvenile salema are more silvery with fainter stripes that intensify with age. The combined golden striping and grazing incisor teeth are the most reliable field marks distinguishing it from other Mediterranean sparids.

Sarpa salpa favors shallow, warm-temperate to subtropical coastal waters, typically from the surface down to about 30 meters. It is most abundant over rocky reefs, breakwaters, and especially Posidonia oceanica seagrass meadows, where dense algal turf and epiphytic growth provide constant grazing. The species ranges through the Mediterranean and Black Sea and along the eastern Atlantic coast from the Bay of Biscay south to Angola and South Africa, with strays reported farther afield. Juveniles often shelter in shallower, more sheltered bays and estuarine-influenced harbors before moving to open reef and seagrass habitat as adults. Water temperature strongly influences seasonal movement, with fish retreating to deeper, more stable water during colder months.

Salema are strongly gregarious, forming large, loosely structured schools that drift slowly over reef and seagrass habitat while grazing continuously on algae and epiphytes. Feeding activity peaks during daylight, with schools dispersing somewhat at night. As one of the few herbivorous sparids, it relies on a long, coiled intestine to extract nutrients from fibrous plant material. Spawning occurs in warmer months, with pelagic eggs released into open water and no parental care afterward. Sarpa salpa is a protandrous hermaphrodite in some populations, with individuals maturing first as males before some transition to females. Schools are relatively approachable and often tolerate divers, making them a common sight on Mediterranean reef dives.