Heather Angel / Man using pole to propel bamboo raft on Lijang / Li River, Karst peaks beyond. At dawn, Lijiang River Scenic Zone, Yangshuo county, Guangxi, China.

Nigel Cattlin / Harlequin ladybird (Harmonia axyridis) larvae still with a raft of empty egg cases, June Berkshire, England, UK.

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

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

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

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

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.

Suzi Eszterhas / Sea Otter (Enhydra lutris) raft, Monterey Bay, California, digitally manipulated

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

Staffan Widstrand,Staffan Widstrand / Throw-net fisherman, on raft, Pulicat Lake, Tamil Nadu, India, January 2013.

Staffan Widstrand,Staffan Widstrand / Throw-net fishermen on raft, Pulicat Lake, Tamil Nadu, India, January 2013.

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