Some fish live deep down in the ocean where it is pitch-dark Do they see If so how?

Yes, some fish that live in the deep ocean can see, although their vision is adapted to the extreme darkness. Many deep-sea fish have large eyes that allow them to capture any available light, often from bioluminescent organisms. Additionally, some species possess specialized cells called rods that enhance their ability to detect light at very low levels, enabling them to navigate and hunt in their pitch-dark environment.