Water beetle larva?

Water beetle larva?

Observation - Water beetle larva? - UK and Ireland. Description: We have quite a few of these in our pond and they seem ferocious. They are large but are they large enough to be Great Diving Beetle Larvae? Sorry pic isn't too clear, but it's the best I could do! It was eating at the time!

We have quite a few of these in our pond and they seem ferocious. They are large but are they large enough to be Great Diving Beetle Larvae? Sorry pic isn't too clear, but it's the best I could do! It was eating at the time!