With its sharp spike and beak-like mouth, this unusual and vicious creature caused quite a stir when it turned up in Norfolk.More used to warmer climes, the grey trigger fish, or balistes caronlinensis, was a long was from home when it was caught one mile off the coast of Sheringham.

With its sharp spike and beak-like mouth, this unusual and vicious creature caused quite a stir when it turned up in Norfolk.

More used to warmer climes, the grey trigger fish, or balistes caronlinensis, was a long was from home when it was caught one mile off the coast of Sheringham.

North Norfolk fisherman Rob Brownsell, who discovered it during an outing on Monday, said he could not identify it.

He said: 'I started going to sea when I was 18; I'm now 56 and I've never seen that before.'

In fact, the closest most people in Norfolk usually get to a trigger fish is at the Sea Life Centre in Yarmouth where there are five of them.

Christine Pitcher, from the attraction, said the creature was usually found in the western Atlantic, near places like Bermuda and Argentina.

The displays supervisor said trigger fish could also be found in the Mediterranean or the eastern Atlantic, from the English and Irish coast down to Angola.

But she added: 'They stay around the south coast as the waters are slightly warmer due to the various streams the south coast gets. As the oceans warm slightly it will be more common to see this species of fish around the east coast of England and Norfolk, but we would consider this a very unusual find for this area.'

The Sea Life Centre said it had not heard of any others being found around the county.

In Yarmouth, the five trigger fish are kept in a large tank away from the other species. With sharp and strong teeth, they can be quite aggressive and will attack smaller fish.