Lichens are symbiotic fungi that occur throughout the terrestrial
environment and into the intertidal zone where they colonise suitable hard substrates
of the upper shore and splash zone.
They are often the defining species of splash zone habitats
and come in a variety of forms and colours.
Below are images of the common lichens you may encounter
whilst rock pooling around the UK:
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| An orange lichen (Xanthoria parietina). |
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| An orange lichen (Xanthoria parietina). |
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| Black lichen (Lichina pygmaea). |
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| Tar lichen (Verrucaria maura) and an orange lichen. |
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| Tar lichen (Verrucaria maura) forms a thin black crust over the rock |
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| Above the high tide mark Sea ivory (Ramalina siliquosa) and the orange lichen, Xanthoria parietina occur. |
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| Sea ivory (Ramalina siliquosa) |
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| Sea ivory (Ramalina siliquosa) |
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| Sheep are partial to sea ivory! |
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| Possible Parelle (Ochrolechia parella). |
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| Anaptychia spp. |
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