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Dolomedes plantarius Fen Raft spider from above. The markings of the spider can be sfairly similar to the other Dolomedes (ie fimbriatus) spider, but it often lacks the big light stripes from the head and back. (Found: Sweden. ) Head-on view of a female Fen Raft spider. (Found: Sweden. ) Head-on close-up of a female Fen Raft spider. (Found: Sweden. ) Female Dolomedes fimbriatus guarding the egg sac. (Found: Sweden. ) Young female Dolomedes plantarius. (Found: Sweden. ) Young female Dolomedes plantarius, side-view. (Found: Sweden. ) Head-on view of a young female Dolomedes plantarius. (Found: Sweden. )

Facts: Family: Pisauridae Scientific name: Dolomedes plantarius Common name: Fen Raft spider This fishing spider is not as common at the D. Fimbriatus. It is fast and hunts its prey down. It can run on the surface or swim under water to catch prey. If it feels threatened the spider can hide submerged for an hour. Often it has its front legs on the water surface to detect vibrations of possible prey.

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Disclaimer. I am a photograper, not an arachnologist. Allthough I spend a lot of time on spider identification, I can not give a 100% guarantee on the id of the spiders.