Nick Upton / Young boy watches as a Shore crab (Carcinus maenas) caught in a rockpool is placed in his bucket, Cornwall, UK, October. Model released.

SCOTLAND: The Big Picture / Atlantic salmon (Salmo salar) fry and parr, temporarily stunned awaiting measurements to be taken, Cairngorms National Park, Scotland, UK, September 2015.

SCOTLAND: The Big Picture / Atlantic salmon (Salmo salar) parr, temporarily stunned before measurements are taken, Cairngorms National Park, Scotland, UK, September 2015.

SCOTLAND: The Big Picture / Spey Fisheries Board biologist releasing Atlantic salmon (Salmo salar) fry back into the river Dulnain after catching them for annual counts and measurements, Cairngorms National Park, Scotland, UK, S...

Will Watson / Colorado Potato Beetle (Leptinotarsa decemlineata) collected by hand and placed in bucket, Romania.

Gary K. Smith / Traders and customers in Rialto fish market, Venice, Italy, April.

Gary K. Smith / Tomato plant seedlings in plastic flower pot. England, UK. February.

Nick Turner / Steve Parkes, Cotswold Lion sheep breeder (Ovis Aries), a rare breed native to Gloucestershire brought by Roman settlers to the Cotswolds, UK. November 2015.

Nick Turner / Meadow grassland seed harvesting by the Cotswolds Conservation Board, Syreford, Gloucestershire, UK. July.

Jeff Rotman / Fishermen sorting catch of Yellowtail flounders (Limanda Ferruginea) and Atlantic cod (Gadus morhua) on the deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean,...

Jeff Rotman / Fishermen sorting catch of Yellowtail flounders (Limanda Ferruginea) and Atlantic cod (Gadus morhua) on the deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean,...

Jeff Rotman / Fisherman cleaning Yellowtail flounder (Limanda ferruginea) on the deck of fishing dragger. Stellwagen Bank, New England, United States, North Atlantic Ocean, March 2009. Model released.