Sun, 03 May 2026 14:42:50 +0000

Shocking Truth: Jellyfish Can’t Swim in the Night—Here’s the Bone-Chilling Reason! If you’ve ever watched jellyfish pulse gracefully through the water under moonlit skies, you may have been mesmerized—until you learn they don’t actually swim like fish. While they drift effortlessly with ocean currents, new research reveals a startling secret: jellyfish dislike swimming at night. Here’s the bone-chilling reason why. Why Jellyfish Avoid Nighttime Movement Unlike most marine animals that actively propel themselves through water, jellyfish primarily drift with the currents. Their gelatinous bodies contain minimal muscle power, and their pulsing motion is slow and energy-efficient—perfect for conserving energy in the dark. Recent studies show that introducing artificial light at night dramatically disrupts their natural behavior. The sudden illumination causes jellyfish to reduce forward movement, effectively “shutting down” their swimming reflexes.