Lewis Jefferies / Common hermit crab (Pagurus bernhardus) in Painted topshell, resting on Golden kelp (Laminaria ochroleuca) frond, encrusted with Lacy crust bryozoans (Membranipora membranacea), Lizard Peninsula, Corn...

Lewis Jefferies / Spiney squat lobster (Galathea strigosa) resting at night on Golden kelp (Laminaria ochroleuca) frond covered in Seamat (Membranipora membranacea), Lizard Peninsula, Cornwall, UK, Atlantic Ocean.

Lewis Jefferies / Grey seal (Halichoerus grypus) female, swimming upside down over Golden kelp (Laminaria ochroleuca) with sunrays, Lundy Island, Bristol Channel, Devon, UK.

Lewis Jefferies / Crystal jellyfish (Aequorea victoria) floating above Golden Kelp forest (Laminaria ochroleuca) Lundy Island, Bristol Channel, Devon, UK.

Lewis Jefferies / Grey seal (Halichoerus grypus) amongst Serated wrack (Fucus serratus) and Thongweed (Himanthalia elongata) on seabed, Lundy Island, Bristol Channel, Devon, UK.

Lewis Jefferies / Grey seal (Halichoerus grypus) resting among Golden kelp forest (Laminaria ochroleuca), Lundy Island, Bristol Channel, Devon, UK.

Lewis Jefferies / Grey seal (Halichoerus grypus) swimming over Thongweed (Himanthalia elongata) with Moon jellyfish (Aurelia aurita) in background, Lundy Island, Bristol Channel, Devon, UK.

Lewis Jefferies / Snakelocks anemone (Anemonia viridis) flowing in the current on frond of Golden kelp (Laminaria ochroleuca). Lamora Cove, West Cornwall, UK, Atlantic Ocean.

Lewis Jefferies / Golden kelp (Laminaria ochroleuca) with Spotted gobies (Gobiusculus flavescens) swimming in shallow water, backlit by the summer sunshine, Lamorna cove, West Cornwall, UK, Atlantic Ocean.

Alex Mustard / Copper rockfish (Sebastes caurinus) swimming through a kelp forest (Nereocystis luetkeana), Browning Pass, Vancouver Island, British Columbia, Canada, Queen Charlotte Strait, Pacific Ocean.

Alex Mustard / Stiletto shrimp (Heptacarpus stylus) crawling down the twisted stipes of Bull kelp (Nereocystis luetkeana), Browning Pass, Vancouver Island, British Columbia, Canada, Queen Charlotte Strait, Pacific O...

Doug Allan / Southern fur seals (Arctocephalus gazella) swimming beside Giant kelp (Macrocystis pyrifera), South Georgia, Atlantic Ocean.