Fungus Rock is a huge rock in Dwejra Bay, on the western coast of Gozo. Access is only by boat. The average depth is of 40 metres. This isolated rock has a hole running through its northern part. Underwater, the scenery is as impressive as above, with vertical walls, fissures, gulleys and caverns created by boulders, which provide excellent habitat for the largest groupers. Looking upwards, one can often see tuna, amberjacks and barracudas. The walls of the rock are covered in algae, sea urchins, tube worms, starfish, bristle worms and sea potatoes, with their brilliant red colour.