Otter devours fish

Breakfast today was porridge and toast. My wife and baby boy had the same but the otter sitting on the shore about fifty yards from the house was munching away on a chunky fish. I ate breakfast quickly and wandered down to the shore. Luckily the sun had just popped up over Beinn Buidhe so the light was shining on the otter's wet fur. Lying on the seaweed I managed to get these shots. If anyone knows what kind of fish the otter is eating I'd love to know.