The term 'Fierce Whale' can be broken down into two crossword solutions: ORCA (4 letters) and GRAMPUS (7 letters). ORCA is the common name for the species of whale known as the Killer Whale, which is the largest member of the dolphin family. GRAMPUS is another name for the Risso's Dolphin, a species of dolphin that is found in temperate and tropical waters around the world. Both the Killer Whale and the Risso's Dolphin are fierce predators, making them fitting solutions for the term 'Fierce Whale'.