Adrian Davies / Common puffball (Lycoperdon perlatum) Sussex, UK, November.

Mike Read / Common puffball (Lycoperdon perlatum) growing through leaf litter in deciduous woodland near Buckhill Hole, New Forest National Park, Hampshire, England, UK, October 2015.

David Kjaer / Common puffball (Lycoperdon perlatum) young form, Wiltshire, UK

David Kjaer / Common puffball (Lycoperdon perlatum) young form, Wiltshire, UK

Andy Sands / Common puffball (Lycoperdon perlatum) releasing spores, Buckinghamshire, England, UK, November. Digital composite.

Andy Sands / Common puffball (Lycoperdon perlatum) Digital composite. Digital composite

Matthew Maran / Common puffball (Lycoperdon perlatum), Hampstead Heath, England, UK. September.

Doug Wechsler / Warted Puffball (Lycoperdon perlatum) Larrabee State Park, Whatcom County, Washington, USA, September.

Ernie Janes / Common Puffball (Lycoperdon perlatum) dispersing spores, UK

Philippe Clement / Common / gem-studded puffballs / devil's snuff-box (Lycoperdon perlatum / gemmatum) Belgium

Philippe Clement / Common / gem-studded puffball (Lycoperdon perlatum / gemmatum) among fallen beech leaves, Belgium

Philippe Clement / Common / gem-studded puffball (Lycoperdon perlatum / gemmatum) among fallen beech leaves, Belgium

SCOTLAND: The Big Picture / Spiny starfish (Marthasterias glacialis), South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

SCOTLAND: The Big Picture / Curled octopus (Eledone cirrhosa) and a Spiny starfish (Marthasterias glacialis) on sea floor, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

SCOTLAND: The Big Picture / Spiny starfish (Marthasterias glacialis) and Lesser cylinder anemone (Cerianthus lloydii) in no take zone, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

SCOTLAND: The Big Picture / Spiny star fish (Marthasterias glacialis) amongst kelp, South Arran Marine Protected Area, Isle of Arran, Scotland, UK, August.

Solvin Zankl / Red spiny cushion seastar (Porania antarctica) Comau Fjord, Patagonia, Chile, Atlantic Ocean

Pascal Kobeh / Necklace starfish (Fromia monilis) on variable thorny oyster (Spondylus varius), Maldives, Indian Ocean. This starfish is a predator of oysters.

Sue Daly / Arm of Spiny Starfish (Marthasterias glacialis) showing tube feet, Guillaumesse, Sark, British Channel Islands.

Sue Daly / Spiny Starfish (Marthasterias glacialis) L'Etac, Sark, British Channel Islands.

Sue Daly / Arm of Spiny Starfish (Marthasterias glacialis) to showing tube feet, Grune Du Nord, Sark, British Channel Islands.

Nick Upton / Boy holding a Spiny starfish (Marthasterias glacialis) found in a rockpool at low tide, Cornwall, UK, April. Model released.

Nick Upton / Two Spiny starfish (Marthasterias glacialis) found in a rockpool at low tide, held in a boy's hands, Cornwall, UK, April. Model released.

Alex Mustard / Sea stars (Marthasterias glacialis) mass together to exploit a food source. Gulen, Bergen, Norway. North East Atlantic Ocean.