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Dominica is a volcanically active island, and the Soufriere area features submarine geothermal activity where heated gas and water seep through the seabed. At the pinnacle, streams of bubbles rise from cracks in the volcanic rock, and surrounding sand patches are noticeably warmer. The vents release primarily carbon dioxide and hydrogen sulfide in small quantities. The minerals from these vents contribute to the exceptional nutrient levels that support the dense marine life in the area.

Soufriere Pinnacle and Scotts Head Pinnacle are separate dive sites within the same marine reserve. Scotts Head is the more famous site located at the peninsula's tip where the Caribbean meets the Atlantic. Soufriere Pinnacle is further inside the bay, rising from deeper volcanic substrate with more pronounced geothermal activity. It generally has less current, deeper walls, and denser soft coral growth. Both sites are excellent and are often dived on the same trip.

Dominica is one of the Caribbean's more affordable diving destinations. The island has not developed mass tourism infrastructure, keeping prices moderate compared to neighbouring islands. Dive packages from local operators typically cost significantly less than equivalent diving in the Cayman Islands, Turks and Caicos, or the US Virgin Islands. Accommodation ranges from budget guesthouses to modest eco-lodges. The trade-off is less luxury infrastructure, but for diving-focused visitors this is outweighed by the reef quality.