Gruta do Ilhéu das Cabras (Sheep Islet cave)
Sheep Islet lies about half a nautical mile off Terceira's south coast; the cave is on the islet's north slope. The entrance is at about 15 m and the cavern, large enough to enter by boat, rises to about 12 m inside. It is named for the summer sightings of up to a dozen stingrays swimming inside, with a strong backlight crossed by their shadows. At the deepest point, 24 m, schools of Almaco jacks, yellowmouth barracuda and bluefish pass.
depth: 12–24 m