Which layer of the ocean are flying fish usually found? What are the lighting conditions characteristic of #1? Would good eyesight be necessary for organisms in #2 environment?
Flying fish
Flying fish  are commonly found in the epipelagic zone, the top layer of the ocean to a depth of about 200 m (656 ft).  The epipelagic zone is the illuminated zone at the surface of the sea where enough light is available for photosynthesis.  Good eyesight is a necessary survival trait for animals living in well-lit areas.
Family of marine fish that can make powerful, self-propelled leaps out of water
Do flying fish have good eyesight?