The term SEA PREDATORS can be broken down into two crossword solutions: ORCAS (5 letters) and SHARKS (6 letters). Orcas, also known as killer whales, are the largest member of the dolphin family and are found in all oceans. They are apex predators, meaning they have no natural predators, and feed on fish, squid, and other marine mammals. Sharks are a species of fish that have been around for millions of years and are found in all oceans. They are also apex predators and feed on smaller fish, squid, and other marine life.