Gateway Rock is a reef site located off Green Island, Taiwan, featuring depths between 20 and 30 metres. The site is characterised by calm conditions, making it a suitable location for divers to build confidence. Visibility typically ranges from 10 to 30 metres, providing a view of the reef structure. Access is exclusively by boat. Divers should be aware of surge and swell conditions during entry and maintain close contact with the vessel. Water temperatures remain consistent throughout the year, ranging from 25 to 29 degrees Celsius, with a 3mm wetsuit generally sufficient for the conditions.

Chai Kou is a reef site located on Green Island, Taiwan, offering shore access suitable for beginners. The site features visibility ranging from 10 to 30 metres and water temperatures between 25 and 30 degrees Celsius. Divers and snorkellers should be aware of hazards including sea urchins, sharp coral, and surf. Entry requires navigating a shore break, so timing your movement during a lull is recommended. While the current is generally mild, conditions can include unpredictable surge or swell. Reef shoes or booties are advised for the shallow areas. Facilities at the site include parking and toilets.

Chaikou Snorkelling Area on Green Island features a shallow reef ranging from 1 to 10 metres in depth, with an average of 5 metres. This site is suitable for beginners, offering mild currents and visibility between 10 and 25 metres. Shore entry requires caution due to sharp coral, rocks, and sea urchins near the waterline; reef shoes or booties are strongly recommended. Snorkellers should time their entry to avoid the shore break. Water temperatures remain between 25 and 30 degrees Celsius. Hazards include stonefish on the seafloor and jellyfish in the water. Facilities include parking and a rinse station.

Dory Reef is an offshore reef located 1000 metres from Green Island, Taiwan. The site features reef terrain ranging from 15 to 33 metres in depth, with an average depth of 17 metres. Divers must access this location by boat. Conditions include moderate currents that can shift with little warning, requiring divers to be comfortable with drift diving and buoyancy control. Visibility is typically between 20 and 40 metres. Due to the exposed nature of the site, surface conditions such as surge and swell can change quickly. Divers should coordinate closely with their boat operator and divemaster regarding current strength and pickup arrangements before entry.

Zhongliao Port on Green Island, Taiwan, offers a shallow reef and muck diving environment suitable for beginners. Divers typically experience depths of 5 metres with mild currents and visibility ranging from 10 to 30 metres. Shore entry is standard for this site. Marine life recorded here includes wrasses, Indian lionfish, snowflake moray, and various nudibranchs such as Nembrotha and Trance Wrinkle Dorid. Other species observed include Ijima's sea snake, semicircle angelfish, striped surgeonfish, banded coral shrimp, porcupinefish, white-spotted puffer, and yellow boxfish. Hazards to consider include potential entanglement, variable visibility, and surf conditions. Typical dives last approximately 40 minutes.

The Back Garden (Lighthouse) site is a reef location situated off Green Island, Taiwan. This site is suitable for beginner divers, offering a consistent average depth of approximately 9 metres. Conditions at this location vary, with water temperatures ranging from 25C to 30C throughout the year. As a reef environment, the topography is defined by its coral structures. Divers should be prepared for variable conditions typical of this marine area. Access to the site is generally managed via boat, providing a straightforward experience for those developing their diving skills in a reef setting.

Jichang Fault is a dramatic underwater landscape situated on the outer edge of the Green Island reef system. This site is defined by its geological fault line, which has created a complex topography of walls, canyons, and drop-offs reaching depths of 46 metres. With an average depth of 30 metres, this site is suited for advanced divers. Visibility ranges from 15 to 40 metres, allowing for clear views of the structural features. Strong currents are a constant factor, requiring drift-diving experience and precise buoyancy control. Access is by boat only, and divers should time their entry to coincide with slack water to safely explore the deeper sections.

Confucius Rock is a marine dive site located on Green Island, Taiwan, featuring a combination of reef, cave, and cavern topography. Divers access the site from the shore by walking along a trail to the intertidal zone and crossing a lagoon. The site reaches depths between 5 and 28 metres. Conditions are variable, with strong currents possible, making this location suitable for intermediate divers. Night diving is permitted at this site. Water temperatures remain consistent throughout the year, ranging from 25C to 29C. It is recommended to plan entry during high tide for easier access to the water.