You have just over 24 hours left to enter UPY - the Underwater Photographer of the Year competition.
Entries must be submitted by Friday 4 January 2019 (midnight GMT) because judging will be taking place from Sunday 6 to Tuesday 8 January 2019. Each image entered will be seen at least twice by the judging panel.
This year there are twelve main categories.
* Wide Angle
* Up & Coming
* British Waters Wide Angle
* British Waters Macro
* British Waters 'Living Together'
There are two new categories in the 2019 competition:
* Marine Conservation Photographer of the Year
* Underwater Photography Book of the Year