Pelagic is a term used to describe the environment of the open ocean, which is the largest habitat on Earth. It is characterized by the presence of SEA creatures that live in the water column, rather than on the seafloor or near the shore. The term SEA (3 letters) refers to the body of salt water that covers most of the Earth's surface, while MARINE (6 letters) describes the organisms that inhabit it. NAUTICAL (8 letters) is an adjective used to describe things related to ships and sailing, while MARITIME (8 letters) is a broader term that includes all activities related to the SEA. OCEANIC (7 letters) is an adjective used to describe things related to the ocean. All of these terms are related to the pelagic environment, which is the open ocean.