Franco Banfi / Split level view of Water hyacinth, (Eichhornia sp.), in a spring close to Bonito, Mato Grosso do Sul, Brazil

Alex Mustard / 2020VISION / Lesser spotted catshark / dogfish (Scyliorhinus canicula) hiding amongst sea weeds, Babbacombe Bay, Devon, England, UK, English Channel, April

Cheryl-Samantha Owen / Blacktip reef sharks (Carcharhinus melanopterus) in shallow water gathering very close to shore, Aldabra Atoll, Seychelles, Indian Ocean

Alex Mustard / Lemon shark (Negaprion brevirostris) at the surface, split level. Little Bahama Bank, Bahamas. West Atlantic Ocean.

Jordi Chias / Blue shark (Prionace glauca) close up, Azores, Portugal. Finalist in Wildlife Photographer of the Year Awards (WPOY) Competition 2014

Alex Mustard / Oceanic whitetip shark (Carcharhinus longimanus) with Pilot fish (Naucrates ductor). Tropical West Atlantic Ocean, off Cat Island, Bahamas.

Alex Mustard / Great white shark (Carcharodon carcharias) portrait, Guadalupe Island, Mexico, Pacific Ocean.

Alex Mustard / Caribbean reef shark (Carcharhinus perezi) over sand ripples, Walkers Cay, Bahamas. Tropical West Atlantic Ocean. Taken with natural light.

Alex Mustard / A large Great hammerhead shark (Sphyrna mokarran), about 4m in length, cruises overhead. Bahamas, Tropical West Atlantic Ocean.

Alex Mustard / Split level image of Caribbean reef shark (Carcharhinus perezi) breaking surface at dusk. Grand Bahama, Bahamas. Digitally manipulated image.

Alex Mustard / A split level digital composite showing a Basking shark (Ceterhinus maximus) feeding on plankton around St Michael's Mount, Cornwall, UK. June

Alex Mustard / 2020VISION / Basking shark (Cetorhinus maximus) with mouth wide open feeding on plankton concentrated in surface waters close to the island of Coll, Inner Hebrides, Scotland, UK, June 2011. 2020VISION Exhibition....

Alex Mustard / 2020VISION / Basking shark (Cetorhinus maximus) feeding on plankton in the surface waters around the island of Coll, Inner Hebrides, Scotland, UK, June. 2020VISION Book Plate. Did you know? The largest Basking sha...

Nuno Sa / Whale Shark (Rhincodon typus) accompanied by Pilot Fish (Naucrates ductor) and Remora. The biggest fish in the world has only started to visit the Azores in the past three years due to water temperatu...

Nuno Sa / Blue Shark (Prionace glauca) near sea surface and divers in background. Santa Maria, Azores, September.

Pete Oxford / Shoal of Silky sharks (Carcharhinus falciformis)~Jardines de la Reina National Park, Cuba

Alex Mustard / Whale shark (Rhincodon typus) mouth open filter feeding at the surface, Quintana Roo, Yucatan Peninsular, Mexico, Caribbean Sea.

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...

Chris & Monique Fallows / Blue Shark (Prionace glauca) Cape Point, South Africa.

Chris & Monique Fallows / Ragged tooth shark (Carcharias taurus) showing teeth, De Hoop, South Africa.

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) breaching whilst attacking seal decoy, Seal Island, False Bay South Africa.

Michele Westmorland / Whale shark (Rhincodon typus) Galapagos Islands., Darwin Island and Arch, Galapagos

Alex Mustard / Whale shark (Rhincodon typus) silhouette, feeding on floating fish eggs (not visible) just below the surface in calm weather. Note the bow wave ahead of the shark. Isla Mujeres, Quintana Roo, Yucatan...