The arachnid (Argyroneta aquatica) breathes air from a bubble that it grabs from the surface of water using fine hairs on its abdomen. The spider traps the air within a bell-shaped silken web that it constructs underwater and carries around like an aqualung.
It was first described over 250 years ago, but until now biologists didn't know how it managed to remain underwater without frequent visits to the surface to renew the oxygen in its tiny air bubble.
via New Scientist/continue reading
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