Dusky Grouper

Photo: Rino · CC BY-NC

Adult dusky groupers of 60 to 80 centimetres hold territory on the deeper ledges, acting as apex predators that regulate fish-prey populations across the reef. They are a protected species in Tunisian waters and their presence here reflects the relative absence of spearfishing pressure. Juveniles settle in the Posidonia meadows, maturing over a decade before transitioning from female to male.