Aspronisi
Aspronisi is the white islet south-west of the caldera; the first of the listed Aspronisi dives drops from shallow reef (average about 8 m) to 45 m with excellent visibility. Santorini Dive Center lists an 'Aspronisi Dive Spot' among its sites; the listing also mentions nets near the neighbouring Waterfall site.
Tiefe: None–45 m