20 of the top 25, and all of the top 10. o. kay.
i grew up in central florida where we have all 4 varieties of poisonous snake, though the copperhead and coral are rather rare. waded barefoot up and down the lakeshore, never had a problem. swam in lakes with alligators, which are not aggressive as alligators. you learn what to look for, and not to push your luck. the real threat is other humans.