Blue Dome/Cathedral Cave, Gozo:
Named for the brilliant blue shafts of light penetrating its arched entrance, this site features sponge-encrusted boulders, damselfish, bream, and scorpionfish.
Marfa Point Caves (The Madonna), Cirkewwa-Marfa:
This cavern houses a statue of the Madonna, kept company by fire worms, urchins, cardinalfish, octopus, sea stars, and jellies.
Dragonara Cave, L’Ahrax Point:
This shallow cave system in an inland seawater lake offers superb vistas into the open ocean from within the caverns. Look for golden cup corals, red sponges, false coral, tubeworms, sea stars, cardinalfish, chromis, parrotfish, and morays.
Home to the wreck of the Imperial Eagle and a 3-metre/9-foot statue (blessed by the Pope) of Christ, this reef also features a gorgeous array of marine life.
Migrah Ferha (M’tahleb):
Renowned for its steep wall and intricate cave system, this site experiences cold freshwater run-off which creates a unique ecosystem.
Lantern Point/Lighthouse Reef, Comino:
Swim through a wide chimney to a plateau at 14 metres/45 feet. The caverns, overhangs, and small caves here shelter damselfish, sea stars, shrimp, crabs, and sponges. Look for dentex, amberjacks, barracuda, bream, and grouper.
Santa Maria Caves, Comino:
This site features a cave system of more than ten caverns, some of them opening to air pockets, that shelter octopus, crabs, spiny lobster, sponges, conger eels, mullet, shrimp, damselfish, morays, and grouper.
This 114-metre/375-foot British destroyer was bombed and sank during a World War II air raid, after famously helping to sink the German Battleship Bismark. Penetration is possible for experienced divers, and her hull is filled with marine life. Look for octopus, seahorses, and scorpionfish.
Ghar Lapsi, Zurrieq:
This large cavern is renowned for dramatic lighting through cracks in its ceiling, which also provide exits for divers to swim directly out onto the reef.
Malta’s equivalent to the Titanic, this 19th-century passenger liner was sent to the bottom by a German U-Boat during World War I. Resting in deep waters, this is a dive suitable only for experienced divers.