The Diving Bell Spider (Argyroneta aquatica) is the only known spider in the world that lives entirely underwater. Like other arachnids, it must breathe air, so it creates a dome-shaped web between aquatic plants and fills the ‘diving bell’ with air carried from the surface.
They live almost entirely within the bells, darting out to catch prey that touches the bell or theĀ silkĀ threads that anchor it.

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