Reef sharks in Queensland

Reef sharks are part of almost every tropical dive in Australia. Whitetips rest under ledges by day on the inner reefs; blacktips patrol the lagoon shallows and are the first shark most snorkellers see; grey reef sharks hold the current-swept points and passes and gather in numbers at Osprey Reef's North Horn, Asho's Gap at Coral Bay and the Ribbon Reef channels; and silvertips, larger and bolder, cruise the Coral Sea walls. Populations inside the Great Barrier Reef's green zones are markedly higher than outside them.