"Barreleye Fish: The Bizarre Deep-Sea Creature with Transparent Head and Rotating Eyes"

Barreleye fish, also known as Macropinna microstoma, possess unique tubular eyes that can rotate to track prey and are housed in transparent foreheads. These bizarre fish inhabit the Bering Sea and North Pacific Ocean at depths of 2,000 to 2,600 feet. Their eyes are tinted with a yellow pigment, enabling them to distinguish between sunlight and bioluminescence. Barreleyes hover motionless in the dark until they spot potential prey, then dart upward to capture it. Scientists speculate that they feed on crustaceans and larvae caught in the tentacles of siphonophores. The purpose of their transparent heads and other aspects of their lives remain uncertain.