The term 'Aquatic Predator' can be broken down into two crossword solutions: ORCA (4 letters) and SHARK (5 letters). Orcas, also known as killer whales, are the largest member of the dolphin family and are found in all oceans. They are highly intelligent and social animals that hunt in packs. Sharks are a species of fish that have been around for millions of years and are found in all oceans. They are apex predators and have a wide variety of hunting strategies.