Enemies are all over in and out of the water. Continue ahead and go through the door. Fish lurk from the pipes so keep your distance. If you have Kine, jump into the water and go through the door in the pipe current. In a dark room, use the Spark ability to light it up. Use the door that showed and you’ll enter a secret room that holds a Rainbow Drop. Use the Stone ability to break the blocks so you can retrieve the treasure. Go back to the surface and use the door in the water below a rock. In a room full of pipe currents, frogs are swimming everywhere. Navigate the room and you’ll find the goal.