The phrase refers to apparel meant to duplicate the looks of Orcinus orca, particularly for the Halloween vacation. An instance can 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 dressing up permits people to precise an appreciation for marine life and the apex predator of the ocean, providing a recognizable and sometimes putting visible. Traditionally, animal costumes have been common throughout Halloween, with this explicit illustration doubtlessly gaining traction attributable to elevated consciousness of ocean conservation and the charismatic nature of the species.