Published on: 2026-06-26
Deep Ocean and Marine Biology
Which biological phenomenon occurs in deep-sea organisms like the dragonfish to successfully hunt in the absolute darkness of the midnight zone?
Correct
Many deep-sea fish are blind to red light, so the dragonfish acts like a stealthy super-spy by pulsing a red beam that only it can see, effectively using a private flashlight to spot prey that has no idea it is being watched. Echolocation is a pro move for dolphins in shallow, cloudy waters, but it is not the main strategy for these deep-sea stalkers. Thermal imaging is a bust because the deep ocean is freezing and most prey are cold-blooded, making them blend perfectly into the background. Ultrasonic hearing is just not how these creatures navigate the crushing pressure of the abyss.