The animal often associated with the phrase "curiosity killed the cat" is, indeed, the cat. This phrase serves as a proverbial warning highlighting the potential dangers or consequences of inquisitive behavior. Cats are known for their curious nature, often exploring new environments and investigating unfamiliar objects, which can sometimes lead them into risky situations. The saying implies that excessive curiosity might lead to trouble, serving as a cautionary adage for anyone who tends to probe too deeply into matters that may not concern them. However, curiosity is also an essential trait for learning and discovery in various contexts.