Carp anglers who believe in the moon's ability to trigger a feeding spell should be looking to get on the banks this week.
A 'super blue blood moon' is due to take place on Wednesday, January 31, as a series of rare events overlap.
It is the third and final supermoon to occur since December 3, and also a 'blue moon' as it is the second full moon in a calendar month (there was another on New Year's Day).
On top of that, a lunar eclipse will also take place on Wednesday, though it won't be visible in Britain.
Those three factors have not combined in more than 150 years.
A supermoon is the term given to a moon that appears larger in the sky due to its elliptical orbit bringing it closer to the earth.
Some anglers believe the moon has a bearing on fish feeding spells, with full moons and supermoons supposedly providing favourable angling conditions.