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A viral video supposedly showing a large tarantula swimming across the surface of a body of water is frequently shared with expressions consisting of equal measures of amazement, skepticism, and horror: This is a genuine video of that type of arachnid swimming. This footage was originally shared on the Big Bend Ranch State Park/Texas Parks and Wildlife Facebook page in October 2018, along with the caption Did you know that tarantulas can 'swim?' With their legs acting as paddles, they can row across water: Although the video is genuine, this species of spider is not particularly adept at water travel. One paper that investigated the tarantula's ability to swim found that while tarantulas can swim, this swimming is typically a matter of survival and is not a tarantula's preferred mode of travel: The tarantula may be capable of swimming when the situation calls for it, but this spider is not a particularly good swimmer. But other types of spiders are quite comfortable in aquatic environments. The diving bell spider, for instance, spends much of its life underwater, and the dolomedes briangreenei, a species of fishing spider found in Australia, hunts insects on the water. Robert Raven, Principal Scientist of Arachnology at the Queensland Museum, told Mashable Australia: (The dolomedes briangreenei will) sit there on the water and then all of a sudden an insect will hit the water and the spider races out to get it, grabs it, dives under the water and then swims back to the shore and starts eating it.
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