Sue Daly / Thong Weed (Himanthalia elongata) English Channel, off the coast of Sark, Channel Islands, July

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) swimming over Thongweed (Himanthalia elongata) with Moon jellyfish (Aurelia aurita) in background, Lundy Island, Bristol Channel, Devon, UK.

Alex Mustard / Spaghetti seaweed (Himanthalia elongata) growing from a bed of smaller seaweeds, Island of Coll, Inner Hebrides, Scotland, UK, Atlantic Ocean.

Alex Mustard / Pollack (Pollachius pollachius) juveniles, swimming amongst Red pom-pom seaweeds (Ceramium sp.) and Spaghetti seaweed (Himanthalia elongata), Island of Coll, Inner Hebrides, Scotland, UK, Atlantic Oc...

Alex Mustard / Blue lion's mane jellyfish (Cyanea lamarckii) drifting through a seaweed forest with Red pom-pom seaweed (Ceramium sp.) and Spaghetti seaweed (Himanthalia elongata), Island of Coll, Inner Hebride...

Alex Mustard / Serrated wrack (Fucus serratus) and Spaghetti seaweed (Himanthalia elongata) growing in abundance on seabed, Island of Coll, Inner Hebrides, Scotland, UK, Atlantic Ocean.

Alex Mustard / Seaweed forest with Red pom-pom seaweed (Ceramium sp.) and Spaghetti seaweed (Himanthalia elongata), Island of Coll, Inner Hebrides, Scotland, UK, Atlantic Ocean.

Alex Mustard / Spaghetti seaweed (Himanthalia elongata) growing above Red seaweed (Ceramium sp.) and Kelp (Laminaria hyperborea) in shallow water, Talland Bay, Cornwall, England, UK, English Channel.

Alex Mustard / Spaghetti seaweed (Himanthalia elongata) in a tangled mass, growing in sunlight in shallow water, Talland Bay, Cornwall, England, UK, Englaish Channel.

Alex Mustard / Male Fifteen spined stickleback / Sea stickleback (Spinachia spinachia) guarding a nest in Spaghetti seaweed / Thong weed (Himanthalia elongata), Isle of Coll, Inner Hebrides, Scotland, UK, North Atla...

Alex Mustard / Spaghetti seaweed / Thong weed (Himanthalia elongata) growing up to the water surface, Isle of Coll, Inner Hebrides, Scotland, UK, Atlantic Ocean. August.