Wolf spiders also leave quite a bite on humans (not deadly but certainly uncomfortable for a few days, maybe longer). I always catch spiders and let em go outside.
Diving Bell Spider
This one is particularly interesting to me:
Quote:
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It is the only spider known to spend its whole life under water. As with other spiders, it breathes air, which it traps in a bubble held by hairs on its abdomen and legs. Females build underwater "diving bell" webs which they fill with air and use for digesting prey, molting, mating and raising offspring. They live almost entirely within the bells, darting out to catch prey animals that touch the bell or the silk threads that anchor it.
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