Labyrinth of the Sea is the second zone of Sonic Labyrinth. It is a underwater area. This is apparent as starfish, seaweed, and rocks can be found in on the floor outside of the walking area. Although the level is set underwater the gameplay isn't really changed. Sonic moves just as "fast" as before and Sonic never runs out of air. The level uses cannons frequently to help you move from platform to platform. There are also air bubbles which will blast your character into the air. The zone's boss is Kani Pearl.
||This underwater maze has doors to secret rooms, quicksand traps and cannons to fire you over barriers. Some cannons switch directions. Press Button or to fire in the direction shown by the arrow.
— Instruction manual