Doug Perrine / Bioluminescence from glowing plankton in sea tide line on beach, with stars above and ship lights on horizon, Vaadhoo Island, Raa Atoll, Maldives, Indian Ocean, October 2010
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Gary Bell/ Oceanwide / Red tide, Heron Island, Great Barrier Reef, Queensland, Australia
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Theo Bosboom / Sea stacks consisting of flysch rock battered by the incoming tide, playa de Gueirua, Asturias, Northwest Spain. October 2015
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Theo Bosboom / Star shaped sand pattern as photographed at low tide at Luskentyre beach, Lewis and Harris, Scotland, UK, October.
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Ross Hoddinott / Luskentye beach, mountains and incoming tide, Isle of Lewis and Harris, Outer Hebrides, Scotland, UK. October 2018.
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John Chan / Western gull (Larus occidentalis) feeding on a California two-spot octopus (Octopus bimaculoides) on a mudflat at low tide, Southern California, USA, November.
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Duncan Murrell / Coral formations at low tide in Prony Bay in the Southern Lagoon, Lagoons of New Caledonia: Reef Diversity and Associated Ecosystems UNESCO World Heritage Site. New Caledonia.
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Pedro Narra / Aerial view of low tide in Sado estuary, Portugal. November
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Juergen Freund / Timelapse of the tide rising at Cape Leveque, with Mangroves (Rhizophora) in the foreground, Kimberley, Western Australia, 2016
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Juergen Freund / Timelapse of the tide rising in a Mangrove (Rhizophora) forest, Daintree, Wet Tropics World Heritage Area, North Queensland, Australia.
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Juergen Freund / Timelapse of Periwinkle snails (Littoraria) climbing up Mangrove (Rhizophora) roots at lowtide, Daintree, Wet Tropics World Heritage Area, North Queensland, Australia.
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Seth Patterson / A compilation of items found washed up along a half mile stretch of the high tide line of South Padre Island, Texas. October 2016. Some of the plastic bottles and bags of signs of nip marks from hun...