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Sea Cucumbers Glide Through Water In Mesmerizing Deep-Sea Footage

A recent National Oceanic and Atmospheric Administration Okeanos Explorer mission captured various sea cucumbers going about their daily lives on a previously unexplored mud volcano.

The agency said the sea cucumbers were not only able to swim but could also rise, sink, and hover, suggesting that the marine creature had adapted to manage their buoyancy — the force that allows something to float, sink, or remain suspended in a liquid — remarkably well.

“Buoyancy control is critical for these [sea cucumbers],” the agency said.

The sea cucumbers were seen thrusting themselves from the sea bottom, floating, then slowly descending back to the bottom.