Grey Reef Shark

Photo: Luis P. B. · CC BY-NC

Shark Island earns its name from the reliable aggregations of grey reef sharks — often 10 or more at once — that patrol the convergence zone around the pinnacle's base. The current channels concentrate fish and invertebrates, giving these sharks access to a reliable prey base that supports a resident population rather than the transient individuals seen at less productive sites. Their confident, close-passing behaviour at Shark Island is consistent with an absence of historical persecution.