In reply to Sl@te Head:
I've often wondered if there's a business idea here - guiding wealthy. gentrified fly-fishing folk down to the base of sea cliffs, waterfalls and other hard-to-reach places, to cast a few flies.
Incidentally, the guys wasn't fishing with a rod and line, but I recall climbing at Mother Carey's Kitchen in Pembroke about 6 years ago and seeing a guy snorkelling/spear fishing just under the crag. He was catching plenty of huge sea bass. We saw him in the car park afterwards with his catch - impressive.