Russell Cooper / Mandarin duck drake (Aix galericulata) on the water, showing orange 'sail' feathers which are used when displaying, Southwest London, UK, March.

Andy Rouse / Mandarin Duck (Aix galericulata) male on lake, UK, April.

John Cancalosi / Clementine, variety of mandarin

Chris Newbert / Mandarinfish (Synchiropus splendidus), Indonesia

Chris Newbert / Mandarinfish (Synchiropus splendidus), Indonesia

Florian Möllers / Tangerine (Citrus reticulata / delciosa) fruits. Yangshuo, Guangxi, China, November.

Juergen Freund / Mandarinfish (Synchiropus splendidus) Moluccas Islands, Indonesia.

Juergen Freund / Mandarinfish (Synchiropus splendidus) resting on coral. North Raja Ampat, West Papua, Indonesia.

Juergen Freund / Mandarinfish / Picturesque dragonet (Synchiropus picturatus) resting on its fins. North Raja Ampat, West Papua, Indonesia.

Juergen Freund / Mandarinfish / Picturesque dragonet (Synchiropus picturatus) resting on its fins. North Raja Ampat, West Papua, Indonesia.

Juergen Freund / Mandarinfish (Synchiropus splendidus) on coral rubble. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Mandarinfish (Synchiropus splendidus) on coral rubble. Lembeh Strait, North Sulawesi, Indonesia.