Have a Halloween celebration that looks like it could take place under the sea thanks to maritime-style costumes like the new Baby Shark Baby Toddler Child Costume. This adorable yellow romper will look great whether they're pretending to swim around the party, or just playing with all of their other fishy friends and family. It features touches such as a fin, tail and even a shark face at the front for a complete look that's more than ready for Halloween.