Alex Mustard / Portrait of a male short snouted seahorse (Hippocampus hippocampus) in sea oak seaweed (Halidrys siliquosa). Devon, England, United Kingdom. British Isles. English Channel. North East Atlantic Ocean.

Alex Mustard / A close up of a blue shark (Prionace glauca) as it investigates the camera beneath the surface of the English Channel. Penzance, Cornwall, England, British Isles. North East Atlantic Ocean, August.

Alex Mustard / Blue sharks (Prionace glauca) cruise beneath the surface of the English Channel. Penzance, Cornwall, England, British Isles. North East Atlantic Ocean, August. Winner of the Coast and Marine category...

Alex Mustard / Blue shark (Prionace glauca) near the surface of the English Channel. Penzance, Cornwall, England, British Isles. North East Atlantic Ocean, August. Digitally manipulated to improve composition see 1...

Alex Mustard / Blue shark (Prionace glauca) swimming near the surface of the English Channel. Penzance, Cornwall, England, British Isles. North East Atlantic Ocean, August. Highly commended in the Portraits category...

Alex Mustard / Blue shark (Prionace glauca) as it cruises beneath the surface of the English Channel. Penzance, Cornwall, England, British Isles. North East Atlantic Ocean, August.

Sue Daly / Lightbulb seasquirts / tunicates (Clavelina lepadiformis) cluster on rock, Channel Isles, UK, July

Sue Daly / Yellow cave coral {Leptosammia pruvoti} off Sark, Channel Isles, UK

Sue Daly / Yellow cave coral {Leptosammia pruvoti} off Sark, Channel Isles, UK

Sue Daly / Lugworm cast {Arenicola marina} Jersey, Channel Isles, UK

Sue Daly / Warty coral {Eunicella verrucosa} Sark, Channel Isles, UK

Alex Mustard / Foam on the surface of the ocean, probably caused by a algal bloom (Phaeocystis globosa) Lands End, Cornwall, England, United Kindom. British Isles. North East Atlantic Ocean