Santa Marija Caves

Three chambers open onto Santa Marija Bay, each lit differently by the angle of the sun outside. The main entrance arches in at about four metres and opens straight into a room roofed by a surface air pocket, bright enough that a torch stays clipped to the harness for most of the swim. From there, a single-file passage narrows to around six metres and threads an underwater arch into a second chamber. Buoyancy matters here: the ceiling leaves little vertical margin, and a diver who rises uncontrolled stirs silt for the group behind. The route ends at the shallowest of the three rooms, just two to three metres down with its own large air pocket. Outside the caves, an outer reef wall between the entrances drops to eight or ten metres and rewards a slower pass: sponges and sea fans crowd the rock, and nudibranchs turn up on close inspection. Damselfish hold territory on the cave ceilings throughout, cardinalfish shelter in the shade, and octopus tuck into the recesses by day and by night. Regular visitors come back for exactly this unhurried pace. The shallow profile means long bottom times with no decompression clock ticking, and the light show shifts with the sun's angle through the day, turning the same three chambers into a different dive depending on when you go.

Every chamber here sits within Open Water limits, and every entrance stays naturally lit: cave-diving drama without cave-diving risk. That combination is rare on Comino. The island's other two marquee dives, Lantern Point and Cominotto Reef, both push past thirty metres and ask for Advanced certification. A guide assigns sections here by the certification each diver holds: Try Scuba participants and confident snorkellers work the lit chambers under supervision, independent entry needs Open Water, and only the passage beyond ambient light calls for a cavern or cave endorsement. The light is often named as the dive's best feature, pouring in from every angle through the tunnels and arches for striking views with no artificial help, and the shallow depth allows a long, unhurried dive. A 2024 boat-day trip report names this cavern maze alongside the P31 wreck as one of the two dives that define a day out from Gozo, and it commonly forms the shallow half of that same two-dive pairing.

A working primary torch is required once you pass beyond the lit chambers, with a backup for the inner route. Confirm neutral buoyancy before entering any passage: the limestone is fragile, and the narrow six-metre stretch leaves little room to avoid stirring silt for divers behind you. Start your exit from the cavern sections with a minimum of 100 bar and surface with 50 or more; the shallow depth makes for a long, easy dive, though air use per metre runs higher than on deeper profiles. Nitrox extends the bottom time further, though it isn't required here. The outer reef wall between entrances, at eight to ten metres, is worth a slower pass of its own: sponges, sea fans and nudibranchs reward divers who stop rather than swim through. The bay stays sheltered enough to dive on more days year-round than Comino's exposed west-side sites, and conditions rarely rule out a visit.