This mod transforms the Hell into the Deep sea. The whole world, including mobs, textures have been updated to look like he is under water. Perhaps the author was inspired by a future update Minecraft The Update Aquatic, where we promise to add marine animals. How to get to the sea? You can visit the Deep sea, entering into the portal of Deep Sea. It's actually a common portal to Hell. To create it you will need obsidian blocks, silicon and steel. In the ocean you will encounter many unusual creatures.