David Fleetham / Painted frogfish (Antennarius pictus) with first dorsal spine and lure extended to attract prey. Dumaguete, Philippines.

Ashley Cooper / Subsistence farming in the Annapurna Himalayas in Nepal. The terracing has been developed over centuries to farm this steep mountain land.

Ashley Cooper / Cow dung pats drying out to be used as biofuel for traditional clay ovens by subsistence farmers in the Sunderbans, eastern India. December 2013.

Ashley Cooper / Dried cow dung to be used as biofuel on fires for cooking in Delhi, India, December 2013.

Tony Wu / Painted frogfish (Antennarius pictus) in muck environment in Lembeh Strait, North Sulawesi, Indonesia.

Tony Wu / Striped catfish (Plotosus lineatus) large shoal kicking up a cloud of dirt as they forage through the muck, Lembeh Strait, North Sulawesi, Indonesia.

Tony Wu / Diver with an illuminated plush pink soft coral growing in the muck of Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Mantis shrimp (Odontodactylus latirostris) peeking out from its burrow in the muck, standing at full attention, Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Bobbit worm (Eunice aphroditois) protruding from its burrow in the muck of the Lembeh Strait, Indonesia. Bobbit worms are ambush predators, lunging out to grasp prey with their pincers.

Tony Wu / Bobbit worm (Eunice aphroditois) protruding from its burrow in the muck of the Lembeh Strait. Bobbit worms are ambush predators, lunging out to grasp prey with their pincers.

Tony Wu / Blackfin coral goby (Paragobiodon lacunicolus) hiding among the branches of a small coral formation in the muck at Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Common ghost goby (Pleurosicya mossambica) diligently guarding its brood of eggs on the surface of a sponge, in the muck at Lembeh Strait, North Sulawesi, Indonesia.

Tony Wu / Small octopus (Octopus sp) peering out of a discarded glass bottle in the muck of Lembeh Strait in North Sulawesi, Indonesia

Tony Wu / Small moray eel (Gymnothorax sp) covered with parasites, hiding in a bottle in the muck of Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Fimbriated moray eel (Gymnothorax fimbriatus) curled up in discarded paint can in the muck of Lembeh Strait, North Sulawesi, Indonesia.

Tony Wu / Thorny seahorse (Hippocampus histrix) making its way across the muck and rubble substrate of Lembeh Strait in North Sulawesi, Indonesia.

Tony Wu / Mimic octopus (Thaumoctopus mimicus) sitting on dark sand muck in Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Mimic octopus (Thaumoctopus mimicus) travelling across the dark sand muck in Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Mimic octopus (Thaumoctopus mimicus) travelling across the dark sand muck in Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Painted frogfish (Antennarius pictus) walking across the muck on fins, Ambon, Indonesia

Robert Thompson / Aerial view of Isle of Muck, County Antrim, Northern Ireland, UK, September 2009

Robert Thompson / Aerial view of Isle of Muck, County Antrim, Northern Ireland, UK, September 2009

Robert Thompson / Aerial view of Peat hags, Blanket bog looking towards Slieve Muck, Derryveagh Mountains, County Donegal, Republic of Ireland, September 2009

Robert Thompson / Aerial view of Peat hags, blanket bog looking towards Slieve Muck, Derryveagh Mountains, County Donegal, Republic of Ireland, September 2009

Robert Thompson / Aerial view of the scree slopes of Slieve Muck, Derryveagh Mountains, County Donegal, Republic of Ireland, September 2009

Robert Thompson / Aerial view of Slieve Muck and quarry, looking north, Derryveagh Mountains, County Donegal, Republic of Ireland, September 2009

Geoff Simpson / Rum, Eigg + Muck islands from Ardnamurchan, Inner Hebrides, Scotland, UK

George McCarthy / Grass snake {Natrix natrix} on muck heap in stable yard, with horses behind. UK

Niall Benvie / Isle of Muck across the sea, Argyll, Scotland, UK

Roger Powell / Farmer muck spreading with tractor on rich pasture, a main feeding area for migrant geese, near Lindisfarne National Nature Reserve, Northumberland, England, UK, February.

Alex Mustard / Close up of a Lionfish (Pterois volitans) during a hunt, Salawati Island, Raja Ampat, Indonesia. Ceram Sea.