The term 'sharp-toothed swimmer' can be broken down into three crossword solutions: GAR (3 letters), PIRANHA (7 letters), and MORAEL (6 letters). GAR is a type of fish native to North America, with long, slender bodies and sharp teeth. PIRANHA is a species of freshwater fish found in South American rivers, known for their sharp teeth and aggressive behavior. MORAEL is a type of eel found in the Mediterranean Sea, also known for its sharp teeth. All three of these creatures are sharp-toothed swimmers, and they all inhabit different parts of the world.