Scottish Basking shark (Cetorhinus maximus) with mouth wide open feeding on plankton concentrated in surface waters close to the island of Coll, Inner Hebrides, Scotland.
Photographer Alex Mustard
I can't think of a wildlife experience to top it: the moment when Britain's biggest mouth emerges from the blue and lumbers past my camera.
Most uses of the sea involve taking what we want and dumping what we don't which is a shame as the sea is as much a part of our lives as the land.
Did you know? Nobody in the UK lives more than 75 miles from the sea.