Any fish that lives in dark caves or deep ocean and has either no eyes or non-functional eyes, having adapted to environments without light.
Compound of 'blind' and 'fish.' This is a modern descriptive term for deep-sea and cave fauna that have evolutionarily lost their eyes since they're unnecessary in complete darkness.
Blindfish are incredible evolutionary examples—some fish descended from sighted ancestors and completely lost their eyes, while others developed super-sensitive sensory organs instead. In absolute darkness, being blind is actually an *advantage* because you can devote energy to other senses!
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