Here's why:
* Silver fish: Many fish are silvery, so this doesn't narrow it down much.
* Long teeth: While some fish have long teeth, this is usually associated with predatory species.
* Big eyes: Large eyes are common in fish that live in low-light environments, but this doesn't specify a specific type.
Possible interpretations:
* Fantasy creature: You might be thinking of a fictional creature, perhaps from a book, movie, or game.
* Misremembered details: It's possible you're mixing up features of different fish or creatures.
* Incomplete description: There might be more details about this fish that would help identify it.
To help me understand what you're looking for, could you provide more information?
* Where did you hear about this fish?
* What size is it?
* Does it have any other distinctive features?
Once I have more information, I can try to provide a more accurate answer!