Konrad Wothe / Chub (Squalius cephalus) trying to catch a Banded demoiselle (Calopteryx splendens), Bavaria, Germany, June.

Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus) beneath an oil rig. Eureka Rig, Los Angeles, California, USA, September

Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus), beneath an oil rig. Eureka Rig, Los Angeles, California, United States of Ame...

Jeff Rotman / Close up of mouth of a Stoplight parrotfish (Sparisoma viride) Bahamas, Caribbean

Sue Daly,Sue Daly / Blue Maomao (Scorpis violaceus) shoal, Poor Knights Islands, New Zealand, February

Jack Dykinga / The humpback chubs (Gila cypha) amid Grand Canyon wall reflections in the Colorado River near the confluence with the Little Colorado River. Arizona. Vulnerable species.

Michel Roggo / Chubb (Leuciscus cephalus) under ice in frozen river, Aare river, Switzerland 2006

Michel Roggo / Chubb (Leuciscus cephalus) waiting for food at outlet of lake, Croatia, 2005

Michel Roggo / Looking down at Chubb (Leuciscus cephalus) at surface with reflection of bridge, Rhine River, Switzerland, 1993. No release available.

Michel Roggo / Chubb (Leuciscus cephalus) near surface of water waiting for food, Croatia, 2005

Michel Roggo / Chubb (Leuciscus cephalus) waiting near water surface for food, Croatia, 2004

Michel Roggo / Chub fish (Leuciscus cephalus) and Mute swan (Cygnus color) swimming over, Rhine river, Schaffhausen, Switzerland. RUNNER-UP - Wildlife Photographer of the Year 2010.