Taken with my 500mm lens with 1.4 extender, ISO 1000 f8 @ 1/500sec.
Taken with the same kit, ISO 1000 f8 @ 1/800sec.
On the way back decided to look at the harbour area for purple sandpiper, but no luck. On the way back along the prom I looked towards the sea and saw a dolphin jumping. Managed to park the car and spent an enjoyable half hour watching and taking photographs of a pod of up to 6 dolphins in the bay. They were quite a distance out so this is my best effort:
When a fishing boat approached the dolphin went with it, surfing on the bow wave: