Marine menace is a term used to describe any type of threat to the safety of marine life, such as piracy, ORCA hunting, and submarine warfare. The term can be broken down into three distinct parts: PIRATE (6 letters), ORCA (4 letters), and uboat (5 letters). Pirates are criminals who attack ships at sea for their own gain, often stealing cargo and taking hostages. Orcas, also known as killer whales, are large marine mammals that are hunted for their meat and blubber. Uboats are submarines used by navies during wartime to attack enemy ships and submarines. All three of these threats can cause serious damage to marine life and the environment.