Turtle Town offers a reef formed on lava that flowed from Haleakala centuries ago. The caverns and ledges in the lava are a perfect habitat for sponges, corals, octopus, fish, eels, and shrimp. The highlight of this reef is the number of Green Sea Turtles. The Green Sea Turtles are an endangered species and must not be touched or harassed. They are very curious animals and often allow snorkelers a good look from just a few feet away.