Your Little One Will Be Unforgettable In This Dory Costume Dory is the memory-impaired Paracanthurus hepatus bluefish from the Finding Nemo and Finding Dory movies. Now your little one can dress up as this unforgettably forgetful fish in this officially licensed costume. A Dory Zipup Jumpsuit This adorable Dory costume is a high-quality jump suit that conveniently zips up. There is also a hood that can be pulled over your infant or toddler’s head to help keep them warm while trick or treating on Halloween night.