Choose 2 kids to be the “sharks”, the rest of the kids are “fish”. The sharks stand in the middle of the gym/field and the fish stand on one side. The sharks yell: “cross the ocean!” and the fish have to run to the other end of the gym/field and avoid being tagged by the sharks. If they are tagged, they become “seaweed” and have to sit down and wiggle their arms, mimicking the way seaweed moves in the water. The game ends when there are 2 fish left and they become the sharks in the next round.