Alex Mustard / Large / Pot Bellied Seahorse (Hippocampus abdominalis) face portrait. Blairgowrie Marina, Mornington Peninsular, Victoria, Australia, March.

Alex Mustard / Biscuit seastar (Tosia australis) on a sandy seabed. Blairgowrie, Mornington Penisular, Victoria, Australia. Port Philip Bay, Bass Strait.

Nick Upton / Common toad (Bufo bufo) on a riverside footpath, Blairgowrie, Perthshire, Scotland, May.

Nick Upton / Flood defence dyke repaired after major breach during winter storms led to arable farmland becoming flooded in an area where Eurasian beavers (Castor fiber) have become established, River Isla, near B...

Nick Upton / Collapsing flood defence dyke and flooded arable farmland after winter storms in an area where Eurasian beavers (Castor fiber) have become established, River Isla, near Blairgowrie, Perthshire, Taysid...

Nick Upton / Flood defence dyke with debris scattered along the high water mark left after winter storms in an area where Eurasian beavers (Castor fiber) have become established, River Ericht, near Blairgowrie, Pe...

Alex Mustard / Starfish close up detail, Blairgowrie, Mornington Penisular, Victoria, Australia. Port Philip Bay, Bass Strait.

Alex Mustard / A colourful nudibranch (Tambja verconis) crawls over the seabed. Blairgowrie, Mornington Penisular, Victoria, Australia. Port Philip Bay, Bass Strait.

Alex Mustard / Tassled anglerfish (Rhycherus filamentosus) is almost perfectly camouflaged as it hides amongst marine life, waiting to ambush prey attracted to worm life lure. Blairgowrie, Mornington Penisular, Vict...

Alex Mustard / Southern / pacific blue-ringed octopus (Hapalochlaena maculosa) swims across the seabed. Port Philip Bay, Blairgowrie, Melbourne, Victoria, Australia.

Alex Mustard / A Southern sand octopus (Octopus kaurna) digs into the sediment with its long arms at night. While many octopus dig holes, this is the only known species that forms a mucous-lined burrow complete with...

Alex Mustard / Southern sand octopus (Octopus kaurna), photographed at night. This species spends the day burried, with a thin chimney to the surface. Port Philip Bay, Blairgowrie, Melbourne, Victoria, Australia

Alex Mustard / Southern keeled octopus (Octopus berrima) moves across the sand at night. Port Philip Bay, Blairgowrie, Melbourne, Victoria, Australia.

Alex Mustard / Large / Pot Bellied Seahorse (Hippocampus abdominalis) portrait. Blairgowrie Marina, Mornington Peninsular, Victoria, Australia, March.

Brian Lightfoot / Robin (Erithacus rubecula) in snow. Scotland

Brian Lightfoot / Robin (Erithacus rubecula) in snow, Scotland

Brian Lightfoot / Robin (Erithacus rubecula) in snow. Scotland