The Inland Sea tunnel is a cave dive site in Malta, in the Mediterranean Sea. It is described as one of Gozo's most iconic dive experiences. Divers enter from shore and follow the tunnel from a minimum depth of about 3 metres down to a maximum of 26 metres. The site is rated for advanced divers, with an overhead environment and boat traffic noted as hazards. Big reef fish are resident here. Rays, moray eels, nudibranchs, crustaceans, and frogfish and scorpionfish are occasionally seen, along with schooling fish.