The term 'Marine Killer' is a reference to the ORCA, also known as the Killer Whale. It is a large species of dolphin that inhabits all oceans and is the largest member of the dolphin family. Orcas are apex predators, meaning they are at the top of the food chain and have no natural predators. They are highly intelligent and social animals, living in pods and communicating with each other through a complex language.