Here's what's likely going on:
* Chimaeras: This is a real group of cartilaginous fish, sometimes called "ghost sharks." They are related to sharks and rays but are distinct from them. Chimaeras are not predators in the way that many other fish are. They have a diet mainly consisting of mollusks, crustaceans, and small fish.
* Chimera (Mythical creature): This is a mythical creature from Greek mythology, often depicted as a lion, goat, and serpent combined. It's entirely unrelated to any real animal, including fish.
If you're trying to learn about a specific predatory fish, could you please provide more context or information? Perhaps you can tell me:
* What kind of fish you're thinking of?
* Where did you hear this term?
* What are you trying to find out about this fish?
I'd be happy to help you find the information you're looking for!