Possible Clues:

• The killer whale
• Dolphin that sounds like a steam engine
• Popular name for a killer whale
• Whale of a weight, Manx cat carried
• Heavy breather, turning to drink, put on a little weight
• Member of the dolphin family
• Predatory kind of dolphin
• A name for the killer whale
• Aquatic animal showing mass discharge
• Man framing Burlington House member’s “Sea creature”