The Killer whales, also known as the Orcas (Orcinus Orca) are a species of dolphin belonging to the oceanic dolphin family. They are found on all oceans, especially in the Artic regions. They are carnivorous creatures, preying even on large animals like sharks, being known as voracious predators.
One such Orca was spotted near the Rebel Army base during the Second Modern War. The Regular Army soldiers involved in the conflict reported that this Orca ate Allen O'Neil whole as he fell defeated into the sea. Amazingly, Allen was found still alive during the very next war.
- Although real life Orcas are measuring up to 6-8 meters in length, the ones in Metal Slug however measures approximately more than 20 meters.