Can anyone ID this fish?

Can anyone ID this fish?

Observation - Can anyone ID this fish?. Description: I found this fish in a rock pool on Scarborough beach, it was pretty big but half of the body was underneath a rock so couldnt get an exact size. As you can hopefully see from the picture, it has fleshy pink lips, pink eyes and quite a wide head, also had

I found this fish in a rock pool on Scarborough beach, it was pretty big but half of the body was underneath a rock so couldnt get an exact size. As you can hopefully see from the picture, it has fleshy pink lips, pink eyes and quite a wide head, also had teeth with a small gap in the middle. You can just see in the first picture a bright orange fin (bottom right corner) underneath the gill area which I thought was very unusual, but knowing very little about marine fish this could be completely normal! The dorsal fin isnt in this picture but it was fleshy and stood up straight even though part of it was out of water, rather than the flexible, detractable fins you would expect on say a goldfish. I didnt see any barbels underneath the mouth but thats not to say there weren't any. I hope someone can identify it for me, quite a surprise to see such a big fish in a rock pool waiting for the tide to come back in!