Arena is a short boat ride from Praia da Vitoria marina and works well as an easy first look at Terceira's volcanic seascapes. The site follows a low rocky reef with sand patches and a calm layout that suits check dives, gentle underwater photography, and relaxed exploration when local conditions cooperate. Divers can expect Atlantic reef life rather than dramatic topography, with regular reports of octopus, triggerfish, barracuda, amberjacks, sea bream, lobster, and scorpionfish around the rock and sand mix.