Linda Pitkin / Yellow goatfish (Mulloidichthys martinicus), by Grooved brain coral (Diploria labyrinthiformis) Bonaire: Captain Don's Habitat, House Reef, February

Stephen Dalton / Yellow brain (Tremella mesenterica) on Hazel. Sussex, UK

Alex Hyde / Yellow Brain Fungus (Tremella mesenterica), Lake District National Park, Cumbria, UK. February.

John Waters / Golden jelly fungus (Tremella mesenterica) growing on branches of Gorse bush (Ulex europaeus) amid scrub vegetation and pasture, near coast of North Devon, UK, January 2014.

Alex Mustard / Grooved brain coral (Diploria labyrinthiformis) close focus wide angle view, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Brain coral (Colpophyllia natans) showing healthy coral, unmanipulated image. East End, Grand Cayman, Cayman Islands. British West Indies. Caribbean Sea.

Alex Mustard / Brain coral (Colpophyllia natans) probably suffering from white band disease, East End, Grand Cayman, Cayman Islands. British West Indies, Caribbean Sea, January 2010.

Alex Mustard / Grooved brain coral (Diploria labyrinthiformis) close up view, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Pete Oxford / Brain Coral (Diploria labyrinthiformis), Bonaire, Netherlands Antilles, Caribbean

Robert Thompson / Yellow brain fungus {Tremella mesenterica} growing on Hawthorn branch, Inchy Bridge, County Cork, Republic of Ireland, January

Kim Taylor / Yellow brain fungus (Tremella mesenterica) growing on dead crab apple branch, Surrey, England

Philippe Clement / Colourless variety of Yellow brain fungus (Tremella mesenterica), Belgium