The term 'Oceanic Threat' can be summarized by the four-letter word 'ORCA'. Orcas, also known as killer whales, are large marine mammals that inhabit all of the world's oceans. They are apex predators and have been known to hunt other marine animals such as seals, sea lions, and even sharks. Orcas are also a major threat to humans, as they have been known to attack boats and divers in some cases.