Nick Garbutt / Aggregation / bloom / swarm of Moon Jellyfish (Aurelia aurita) in the clear waters of Loch Na Keal, off the Isle of Mull, north west Scotland, UK, June, Photographed through the surface.

Michel Roggo / Water hyacinth (Eichhornia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project. Finalist in the Wildlife Photographer of the Year Awards (WPOY) Competition 2017.

Claudio Contreras / Caribbean flamingo (Phoenicopterus ruber) adults guarding chick, Ria Lagartos Biosphere Reserve, Yucatan Peninsula Mexico, June. Bookplate.

Juergen Freund / Mud crab (Scylla serrata) in shallow sandy water. Split level with island and thatched house on stilts. Moromahu Island, Wakatobi, South Sulawesi, Indonesia. Second Place in the Portfolio Award of the...

Jack Dykinga / Snow geese (Anser caerulescens) flying toward their gathering pond, with moon in the background, Boque del Apache National Wildlife Refuge, New Mexico. December.

Olga Kamenskaya / Clear pane of ice on Lake Baikal, Siberia, Russia, March 2007.

Olga Kamenskaya / Ice formations on Lake Baikal, Siberia, Russia, March 2007.

Olga Kamenskaya / Transparent ice formation on Lake Baikal, Siberia, Russia, March 2012.

Olga Kamenskaya / Ice formations on Lake Baikal, Siberia, Russia, March 2012.

Hougaard Malan / Large wave crashing against rock shelf. Luphathana, Pondoland, Eastern Cape, South Africa. June 2012.

Hougaard Malan / Rock formations in clear water on Anse Source d'Argent beach. La Digue Island, Seychelles. October, 2012.

Olga Kamenskaya / Man looking into ice hole dug for ice diving, Lake Baikal, Siberia, Russia, March. Model released.