Emanuele Biggi / Great Fen / Raft spider (Dolomedes plantarius), adult female eating an invasive species of fish, Western mosquitofish, (Gambusia affinis), Alessandria, Italy, August.

Bernard Castelein / Raft spider (Dolomedes fimbriatus) on Tansy (Tanacetum vulgare), Klein Schietveld, Brasschaat, Belgium August

Alex Hyde / Raft Spider (Dolomedes fimbriatus) female on heathland pool. Note wing of predated damselfly floating on water's surface under the spider. Dorset, UK. August.

Alex Hyde / Fen raft spider / Great raft spider (Dolomedes plantarius) adult female. Norfolk Broads, UK, September. Vulnerable species.

Kim Taylor / Raft spider (Dolomedes fimbriatus) male resting on water surface, Surrey, UK

Ross Hoddinott / 2020VISION / Raft spider (Dolomedes fimbriatus) on water, Arne RSPB reserve, Dorset, England, UK, July. 2020VISION Book Plate. Did you know? Raft spiders trap air bubbles close to their body when they submerge, al...

Stephen Dalton / Raft spider (Dolomedes fimbriatus) feeding on Stickleback fish prey, UK, Pisauridae

Stephen Dalton / Raft spider (Dolomedes fimbriatus) feeding on Stickleback fish prey, UK, Pisauridae

Wild Wonders of Europe / Benvie / Female Raft spider (Dolomedes fimbriatus) with egg sac, Fliess, Naturpark Kaunergrat, Tirol, Austria, July 2008

Wild Wonders of Europe / Benvie / Female Raft spider (Dolomedes fimbriatus) carrying egg sac, Fliess, Naturpark Kaunergrat, Tirol, Austria, July 2008

Ingo Arndt / Fishing spider {Ancylometes bogotensis} on water surface, French Guyana

Dietmar Nill / Raft spider (Dolmedes fimbriatus) on water. Germany, Europe

Jim Brandenburg / Fishing Spider (Pisauridae) pair on moss, Minnesota

Bernard Castelein / Raft spider (Dolomedes fimbriatus) with web on Rush (Juncus sp). Klein Schietveld, Brasschaat, Belgium. September.

Bernard Castelein / Raft spider (Dolomedes fimbriatus) with web on Rush (Juncus sp). Klein Schietveld, Brasschaat, Belgium. September.

Mike Read / Raft spider (Dolomedes fimbriatus) young amongst grass and rush stems, Arne RSPB Reserve, Dorset, England, UK, August.

John Cancalosi / Fen raft spider (Dolomedes plantarius), female guarding babies in nursery web, England, UK, Endangered species

Nick Upton / Juvenile Raft spider (Dolomedes fimbriatus) in vegetation, Studland Heath, Dorset, England, UK, July.

Nick Upton / Raft spider (Dolomedes fimbriatus) juvenile among vegetation around a boggy pool, Studland Heath, Dorset, UK, July.

Nick Upton / Raft spider (Dolomedes fimbriatus) juvenile hunting on vegetation around a boggy pool, Studland Heath, Dorset, UK, July.

Konrad Wothe / Raft Spider (Dolomedes fimbriatus) withfemale Small Red-eyed Damselfly (Erythromma viridulum) prey on water surface, Upper Bavaria, Germany, May.

Nick Upton / Raft spider (Dolomedes fimbriatus) juvenile with fly prey on a Cross-leaved heath (Erica tetralix) flowerhead in a bog, Studland Heath, Dorset, UK, July.

Will Watson / Fen raft spider (Dolomedes plantarius) and Reed beetle (Donacia veriscolorea) on Broad-leaved Pondweed (Potamogeton natans), River, Volyn Oblast, Ukraine, May.

Jussi Murtosaari / Great raft spider (Dolomedes plantarius), hunting its prey on the surface of water, Finland, May.

Jussi Murtosaari / Great raft spider (Dolomedes plantarius) left, and fen raft spider (Dolomedes fimbriatus), Finland, May.

Will Watson / Raft spider (Dolomedes fimbriatus) on Sphagnum, County Kerry, Republic of Ireland. June.

Will Watson / Raft spider (Dolomedes fimbriatus) on Sphagnum, Whixall Moss, Fenn's, Whixall and Bettisfield Mosses National Nature Reserve, Shropshire, England, UK. June.

Bernard Castelein / Raft spider (Dolomedes fimbriatus), Klein Schietveld, Brasschaat, Belgium. August

Emanuele Biggi / Great Fen / Raft spider (Dolomedes plantarius), adult female holding egg sac, Alessandria, Italy. September.

Emanuele Biggi / Great or Fen Raft spider (Dolomedes plantarius), adult female hunting from aquatic vegetation, Po river, Alessandria, Italy, August.

Emanuele Biggi / Great raft spider (Dolomedes plantarius) young individual, Alessandria, Italy, May.

Emanuele Biggi / Fen raft spider (Dolomedes plantarius) female protecting her spiderlings in her nursery web, Italy.

Emanuele Biggi / Great Fen / Raft spider (Dolomedes plantarius), spiderlings on their nursery web, Alessandria, Italy, August.

Emanuele Biggi / Great or Fen Raft spider (Dolomedes plantarius), sub-adult eating a Wolf-spider (Pirata sp.), Alessandria, Italy, August.

Jussi Murtosaari / Raft spider (Dolomedes fimbriatus), female with egg sac, Finland, August.

Nick Garbutt / Raft spider (Dolomedes fimbriatus) resting on water's surface. Nordtirol, Tirol, Austian Alps, Austria. July.

Bernard Castelein / Raft spider (Dolomedes fimbriatus) on Tansy (Tanacetum vulgare), Klein Schietveld, Brasschaat, Belgium August

Andy Sands / Raft spider (Dolomedes fimbriatus) out of water resting on old heather stem, Surrey, England, UK, July

Alex Hyde / Raft Spider (Dolomedes fimbriatus) male resting on the surface of a moorland pool. Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) male resting on the surface of a moorland pool. Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) male resting on the surface of a moorland pool. Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) female resting on the surface of a moorland pool among stems of Horsetail (Equisetum sp.). Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) female resting on the surface of a moorland pool. Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) female resting on the surface of a moorland pool, photographed with a fisheye lens to show surrounding habitat. Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) female resting on the surface of a moorland pool, photographed with a fisheye lens to show surrounding habitat. Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) female resting on the surface of a moorland pool, photographed with a fisheye lens to show surrounding habitat. Nordtirol, Austrian Alps, June.

Alex Hyde / Raft Spider (Dolomedes fimbriatus) juvenile female resting on the surface of a moorland pool. Nordtirol, Austrian Alps, June.

Jussi Murtosaari / Raft spider (Dolomedes fimbriatus), female carrying egg sac, Toivakka, Finland, August.