LoonBalloon SWORDFISH Fish Hawaiian Luau Beach Tropical Pool Party 39in. Mylar Balloon, Accent your ocean or sea themed party with this 39in. large unique shape Swordfish – foil mylar balloon. The perfect balloon for your ocean or sea party, this 39in.party balloon is great for setting the scene! This balloon includes a self-sealing valve, preventing the gas from escaping after it’s inflated. The balloon can be inflated with helium to float or with a balloon air inflator. Balloon arrives uninflated. 39in. Swordfish