The term 'Large Whale' can be broken down into two crossword solutions: HUMPBACK (8 letters) and ORCA (4 letters). HUMPBACK whales are a species of baleen whale that are known for their long pectoral fins and the hump on their back. They are found in all oceans of the world and can grow up to 52 feet in length. ORCA whales, also known as killer whales, are the largest member of the dolphin family. They are easily recognizable by their black and white markings and can grow up to 32 feet in length.