Graham Eaton / Underwater view of a rapidly flowing mountain stream, Snowdonia NP, Gwynedd, Wales, UK, November
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Graham Eaton / Underwater view of a mountain lake with frozen surface, Llyn Idwal, Snowdonia NP, Gwynedd, Wales, UK, December
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Graham Eaton / Underneath the ice of Llyn Dinas lake, Snowdonia NP, Wales, December
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Olga Kamenskaya / Diver exploring sandy lakebed. Lake Baikal, Russia, December 2009.
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Olga Kamenskaya / Petrified tree trunk on lakebed amongst sponges (Lubomirskia baicalensis) and (Baikalospongia sp). Lake Baikal, Russia, December 2009.
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Olga Kamenskaya / Underwater view of lakebed. Lake Baikal, Russia, June 2009.
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SINCLAIR STAMMERS / Coastline by Culver cliff, Isle of Wight. In the Early Cretaceous era Wealden clays was a tropical lakebed. Fossilized dinosaur footprints can now be found amongst loose boulders at the toe of the cli...
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Franco Banfi / Catfish (Siluriformes) resting among rocks on sandy lakebed, Lake Malawi, Likoma Island, Malawi, Africa.
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Franco Banfi / Tangerine tiger cichlid (Protomelas taeniolatus) swimming over sandy lakebed, Likoma Island, Lake Malawi, Malawi, Africa.