Claudio Contreras / Californian sea lion (Zalophus californianus) swimming in Southern sea palm (Eisenia arborea) and Giant Kelp (Macrocystis pyrifera) forest, San Benitos Islands, Baja California Pacific Islands Biosphe...

David Fleetham / Garibaldi (Hypsypops rubicundus) the state fish of California, in forest of giant kelp, (Macrocystis pyrifera) Catalina Island, California, USA.

Alex Mustard / California sea lion (Zalophus californianus) resting in the canopy of a forest of giant kelp (Macrocystis pyrifera). Santa Barbara Island, Channel Islands. Los Angeles, California, United States of Am...

Alex Mustard / Young California sea lion (Zalophus californianus) playing in the canopy of a forest of Giant kelp (Macrocystis pyrifera). Santa Barbara Island, Channel Islands. California, USA. North East Pacific Oc...

Solvin Zankl / Kelp forest (Laminaria hyperborea), Atlantic Ocean, North West Norway, March.

Orsolya Haarberg,Orsolya Haarberg / Brown Algae (Fucus dustuchus) making patterns in snow and sand. Skagsanden beach, Nordland, Norway, February. Highly commended in Plants category of the GDT 2011 competition

Sven Zacek,Sven Zacek / Fresh snow and ice on Baltic Sea coast. The red colour comes from seaweed beneath the ice. Baltic sea coast, Northern Estonia, December 2012.

Alex Hyde / Various rockpool animals and seaweeds, photographed on a white background. Isle of Skye, Inner Hebrides, Scotland, UK, March. Digital composite.

Alex Mustard / 2020VISION / Looking up through water at boy dipping in a rock pool with a shrimping net. Falmouth, Cornwall, England, UK. Model released, July

Alex Mustard / 2020VISION / Common sea urchins (Echinus esculentus) beneath a stand of kelp, Shetland Islands, Scotland, UK, North East Atlantic Ocean, April

Alex Mustard / 2020VISION / Kelp forest (Laminaria sp) growing beneath the cliffs of Lundy Island, Devon, UK, Bristol Channel, July

Alex Mustard / 2020VISION / Young Grey seal (Halichoerus grypus) exploring a seaweed garden in summer, Cairns Of Coll, Island of Coll, Inner Hebrides, Scotland, UK, North Atlantic Ocean, June. Overall Winner of the Marine Catego...