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Related species for the Acorn barnacle (Semibalanus balanoides)
By Location
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Common minke whale (Balaenoptera acutorostrata)
The smallest of the rorqual whales, the common minke whale (Balaenoptera acutorostrata) is also the most abundant. The common minke whale is…
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Harbour porpoise (Phocoena phocoena)
The harbour porpoise is the most commonly seen porpoise, and is the most widely distributed of all cetaceans (whales and dolphins) in…
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Risso's dolphin (Grampus griseus)
One of the most enigmatic cetaceans, this little-known dolphin has an unusual appearance. Unlike many other dolphins, Risso’s dolphin lacks…
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Atlantic mackerel (Scomber scombrus)
The Atlantic mackerel (Scomber scombrus) is a beautifully streamlined, fast-swimming fish. It has silver underparts and metallic green…
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Short-beaked common dolphin (Delphinus delphis)
The short-beaked common dolphin (Delphinus delphis) is the commonest dolphin species, but exact numbers are unknown. It is easily identified…
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Guillemot (Uria aalge)
The guillemot (Uria aalge) is the commonest member of the auk family in the British Isles. The head as well as the upperparts are dark…
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Bottlenose dolphin (Tursiops truncatus)
The bottlenose dolphin (Tursiops truncatus) is one of the most well-known species of dolphin. There appear to be two main varieties; a…
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Common seal (Phoca vitulina)
Also known as the harbour seal, the common seal is the smaller of the two breeding seals in Great Britain. When hauled out it often adopts a…
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Orca (Orcinus orca)
Also known as the killer whale, the orca (Orcinus orca) is the largest member of the dolphin family, and one of the most distinctive of all…
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Cuvier’s beaked whale (Ziphius cavirostris)
In 1823, after mistaking a fragment of skull for a fossil, the French naturalist Georges Cuvier described a seemingly extinct species of…
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Emperor dragonfly (Anax imperator)
The emperor dragonfly (Anax imperator) is Britain's largest dragonfly; they are a spectacular sight with their broad wings and powerful…
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Sei whale (Balaenoptera borealis)
The sei whale is smaller in size than the fin whale (Balaenoptera physalus), and can be distinguished from this similar species because it…
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White-beaked dolphin (Lagenorhynchus albirostris)
Despite the common and Latin names (albirostris means 'white beak'), the short, stocky beak of the white-beaked dolphin is not always white…
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Common duckweed (Lemna gibba)
This duckweed is one of Britain's most common small water plants, which forms familiar green mats covering stagnant water bodies. It has a…
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Gannet (Morus bassanus)
The gannet (Morus bassanus) is a magnificent large seabird, with long narrow wings, a long neck, and instantly recognisable plumage…
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Sea gooseberry (Pleurobrachia pileus)
Members of the phylum Ctenophora are known as sea-gooseberries or comb-jellies, and are startlingly beautiful marine invertebrates. They are…
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Sperm whale (Physeter macrocephalus)
The sperm whale (Physeter macrocephalus) is the largest of the toothed whales, with males growing up to 20 metres in length. The sperm whale…
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Rudd (Scardinius erythrophthalmus)
The rudd is often confused with the roach (Rutilus rutilus), as the two species are similar in appearance. In the rudd, the dorsal fin is…
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Smooth hammerhead (Sphyrna zygaena)
A member of a large and easily recognisable group of sharks, the smooth hammerhead can be distinguished from the other hammerhead species by…
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Grey seal (eastern Atlantic population) (Halichoerus grypus)
The grey seal (Halichoerus grypus) is the larger of Britain's two species of breeding seal. The coat colour varies from grey to brown…
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Sand lizard (Lacerta agilis)
The sand lizard (Lacerta agilis) is larger than the common lizard, and somewhat stockier. Sand lizards have an attractive pattern of dark…
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Blue shark (Prionace glauca)
The blue shark (Prionace glauca) is easily identified by its beautifully coloured slender body, which is a deep indigo-blue across the back…
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Long-finned pilot whale (Globicephala melas)
The long-finned pilot whale is not actually a whale, but a dolphin. Along with the related short-finned pilot whale, this species was once…
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Spiny dogfish (Squalus acanthias)
The common name ‘dogfish’ was given by fisherman to small sharks due to their habit of hunting shoals of fish in ‘packs’. The spiny dogfish…
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Atlantic herring (Clupea harengus)
Many people will be familiar with the Atlantic herring (Clupea harengus) as, for many years, it has been a staple of the fishmonger's…
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Great pond snail (Lymnaea stagnalis)
The aptly named great pond snail (Lymnaea stagnalis) is the largest pond snail in Britain. The great pond snail has a shiny…
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Common water-plantain (Alisma plantago-aquatica)
Common water-plantain is a stout aquatic herb with oval-shaped leaves, which may be rounded or heart-shaped at the base. The pale lilac…
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Wreckfish (Polyprion americanus)
The wreckfish (Polyprion americanus), named for the tendency of juveniles to associate with floating ocean wreckage, is a large bluish-grey…
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Frilled shark (Chlamydoselachus anguineus)
The little-known, deepwater-dwelling frilled shark (Chlamydoselachus anguineus) is one of the most primitive species of living shark…
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Humpback whale (Megaptera novaeangliae)
The magnificent humpback whale (Megaptera novaeangliae) is renowned for its impressive leaping displays and for the mysterious 'singing' of…
