The phrase refers to apparel supposed to duplicate the looks of Orcinus orca, particularly for the Halloween vacation. An instance could be a black and white go well with designed to imitate the coloration and form of the marine mammal, sometimes worn for costume events or trick-or-treating.
Such a fancy dress permits people to precise an appreciation for marine life and the apex predator of the ocean, providing a recognizable and sometimes hanging visible. Traditionally, animal costumes have been standard throughout Halloween, with this explicit illustration doubtlessly gaining traction resulting from elevated consciousness of ocean conservation and the charismatic nature of the species.