Rusty Parrotfish

Scarus ferrugineus

The Rusty Parrotfish is a reef-associated species found primarily in the northwestern Indian Ocean, including the Red Sea, Gulf of Aden, and Persian Gulf. It inhabits coral reefs at depths ranging from 1 to 60 meters. This species is generally common in these regions and can be identified by its two distinct color phases. In the initial phase, often seen in groups, the fish displays a brownish coloration with light and dark bands and a yellow tail. The terminal phase, which consists of adult males, is characterized by a multicolored, predominantly blue-green appearance. Rusty Parrotfish are herbivorous, feeding mainly on benthic algae. They are oviparous and exhibit protogynous hermaphroditism, meaning individuals initially mature as females and can later transform into males. The species forms harems during the terminal phase, where a single male mates with multiple females. Divers encountering the Rusty Parrotfish may observe them actively swimming along coral slopes, grazing on algae. The species is harmless to humans and is classified as Least Concern by the IUCN, although it is a target for artisanal fisheries in its range.