The term SEA MENACE is composed of two crossword solutions, ORCA (4 letters) and PIRATE (6 letters). An ORCA, also known as a killer whale, is a large marine mammal that is found in all oceans. Orcas are apex predators and have been known to hunt other marine mammals, such as seals and dolphins. Pirates are people who engage in illegal activities at sea, such as robbery and smuggling. Historically, pirates have been known to attack ships and steal their cargo. Together, these two terms represent a serious threat to those who travel on the sea.