Snake Bay on Melville Island features hard coral formations located off the Trent Peninsula. This site is suited for advanced divers due to complex tidal movements, with currents ranging from mild to strong rips. Visibility is variable, fluctuating between 10 and 40 metres. The habitat supports a variety of reef fish and invertebrates typical of the region. Access is strictly by boat. Divers must be aware of significant hazards, including the presence of saltwater crocodiles and seasonal risks from dangerous tropical jellyfish. A full wetsuit is recommended for protection. Always consult local operators regarding current and crocodile activity reports before planning a dive.

The Tiwi Islands, located off Bathurst Island, feature shallow reef environments suitable for beginner divers. Access to these sites is exclusively by boat, with mild currents that vary according to tidal shifts. Water temperatures remain warm throughout the year, ranging from 27C to 31C. Visitors should be aware of potential hazards, including the presence of saltwater crocodiles in Northern Territory waters and a stinger season for venomous box jellyfish from October to June. Visibility at these reef sites is variable, and conditions can change between visits. It is recommended to consult with local boat operators regarding current conditions and jellyfish forecasts before planning a trip.

Lethbridge Bay Reefs, located off Melville Island, is a challenging marine site requiring boat access. The area is defined by significant tidal movements, with ranges between 1.5 and 8 metres, resulting in strong rips and sweeps. Divers must navigate these variable currents and exercise extreme caution due to the presence of saltwater crocodiles, which are a constant danger in these coastal waters. Box jellyfish are also prevalent, particularly between October and May. Given these environmental hazards, the site is suited for advanced divers only. Water temperatures remain warm throughout the year, ranging from 27C to 31C.