The Sea Creatures are antagonistic monsters from Tim Burton's 2012 animated film Frankenweenie. They are based on the Sea-Monkey brand of brine shrimp pets, and their characteristics are based on The Creature From The Black Lagoon and the 1984 film Gremlins.
For the New Holland Elementary School science fair, Toshiaki and Bob try to concoct an experiment utilizing Sea-Monkeys as their subject. The experiment doesn't come along very well, but when the boys discover the secret of electricity from Victor's lab, Bob gets the idea to try it out on the Sea-Monkeys on his own. The description on the package doesn't come close to matching the result when Bob unleashes an army of little warriors. Wreaking havoc everywhere, the mischievous Gremlin like Sea Creatures are not easy to stop.