Nick Upton / Painted topshell (Calliostoma zizyphinum) on Kelp frond in rockpool on low shore. Near Falmouth, Cornwall, England, UK. September.

Robert Thompson / Painted top shell (Calliostoma zizyphinum) and Common barnacle (Semibalanus balanoides) on rock at edge of Strangford Lough. Mill Quarter Bay, Killard Point National Nature Reserve, Strangford, County...

Sue Daly / Painted top shell (Calliostoma zizyphinum) Trondheimsfjord, Norway, July.

Franco Banfi / Blue top snail (Calliostoma ligatum), Alaska, United States, North Pacific Ocean.

Sue Daly / Painted top shell (Calliostoma zizyphinum) on seashore, Sark, British Channel Islands.

David Shale / Trochid gastropod - Otukaia (Calliostomatidae). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Trochid gastropod - Otukaia (Calliostomatidae). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

Norbert Wu / Purple-ring Top Snail (Calliostoma annulatum) attacking Strawberry Anemone (Corynactis californica), Monterey, California

Norbert Wu / Purple-ring Top Snail (Calliostoma annulatum) attacking Strawberry Anemone (Corynactis californica), California

Norbert Wu / Purple-ring Top Snail (Calliostoma annulatum) pair on kelp bulb, these snails mate at the top of the kelp canopy, California

Joel Sartore / Photo Ark / Jujube top snail (Calliostoma jujubinum) portrait, Gulf Specimen Marine Lab and Aquarium.

Joel Sartore / Photo Ark / Jujube top snail (Calliostoma jujubinum), ventral view, Gulf Specimen Marine Lab and Aquarium.

Shane Gross / Blue topsnail (Calliostoma ligatum) and other snails feeding on the eggs of the Leafy hornmouth (Ceratostoma foliatum), Vancouver Island, British Columbia, Canada, Pacific Ocean.

David Hall / Maroon hermit crabs (Pagurus hemphilli) in shells of Blue Topsnail (Calliostoma ligatum) Browning Pass, Queen Charlotte Strait, British Columbia, Canada. September.

David Hall / Purple-ringed Topsnail (Calliostoma annulatum), Orange Social Tunicate (Metandrocarpa taylori) and Lattice-work Bryozoan (Phidolophora pacifica), Browning Pass, Queen Charlotte Strait, British Columbi...

Pete Oxford / Copperhead (Agkistrodon contortrix) Northern Georgia, USA, July. Captive, occurs in North America.

Pete Oxford / Cottonmouth (Agkistrodon piscivorus) Little St Simon's Island, Barrier Islands, Georgia, USA, March.

Pete Oxford / Copperhead (Agkistrodon contortrix) Northern Georgia, USA, July. Captive, occurs in North America.

MYN / Clay Bolt / Southern Copperhead (Agkistrodon contortrix contortrix) in bayou wetlands, Jean Lafitte National Park, Louisiana, United States, May. Meetyourneighbours.net project

MYN / Clay Bolt / Southern Copperhead (Agkistrodon contortrix contortrix) in bayou wetlands, Jean Lafitte National Park, Louisiana, United States, May. Meetyourneighbours.net project

MYN / Clay Bolt / Southern Copperhead (Agkistrodon contortrix contortrix) in bayou wetlands, Jean Lafitte National Park, Louisiana, United States, May. Meetyourneighbours.net project

Pete Oxford / Copperhead (Agkistrodon contortrix) snake, northern Georgia

Brent Stephenson / Pair of adult White-eyed ducks (Aythya australis) feeding together, male front left. Slimbridge Wildfowl Trust Centre, Gloucestershire, United Kingdom, May. Captive.

Chris Mattison / Florida cottonmouth snake (Agkistrodon piscivorus conanti) coiled among vegetation, Corkscrew Swamp, Florida, USA, April.

Michael D. Kern / Southern copperhead snake (Agkistrodon contortrix contortrix) captive, from southern USA

Michael D. Kern / Southern copperhead snake (Agkistrodon contortrix contortrix) captive, from southern USA

Daniel Heuclin / Copperhead snake (Agkistrodon contortrix) found in South Eastern USA, captive