Ocean menace is a term used to describe the threats that marine life face from human activities. The three crossword solutions for this term are ORCA (4 letters), Mako (4 letters), and GreatwhiteShark (15 letters). The ORCA, also known as the Killer Whale, is the largest member of the dolphin family and is found in all oceans. The Mako is a species of shark found in temperate and tropical waters around the world. The GreatwhiteShark is a large predatory species of shark found in coastal waters around the world. All three of these species are threatened by human activities such as overfishing, pollution, and habitat destruction.