Swimming & Sealife Party Supplies. Celebrate your little one's special day with a fun themed Sealife Party! A range popular with boys and girls and great for swimming pool parties. Experience a fun floating ocean adventure with our vibrant Under the Sea Party collection. Enjoy swimming through our excellent selection of Under the Sea party supplies which consists of a variety of colorful sea life from turtles and fish to crabs and octopus. Create your own underwater adventure for your little one’s next party.