Nighttime Surface Appearances Coincide With Plankton Rising From the Deep

This deep giant ascends at night following invisible prey.

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The daily vertical migration of plankton is considered the largest animal migration on Earth by biomass.

Megamouth sharks have been observed nearer the surface at night, coinciding with the vertical migration of plankton. As microscopic organisms rise under cover of darkness, the shark follows to feed.

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The synchronized ascent links a five-meter vertebrate to organisms barely visible to the naked eye. Its nightly journey can span hundreds of meters in vertical distance.

This behavior connects the deep twilight zone to surface ecosystems, showing how the smallest drifting life forms orchestrate movements of some of the ocean’s largest fish.

Source

National Geographic

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