Mayfly nymph

Mayfly nymph

Observation - Mayfly nymph. Description: Found in freshwater pond in wildlife area next to river Foss. I'm pretty sure this is a mayfly nymph but if any one can help with identifying the family (or even species) it belongs to that would be great :-)!

Found in freshwater pond in wildlife area next to river Foss.
I'm pretty sure this is a mayfly nymph but if any one can help with identifying the family (or even species) it belongs to that would be great :-)!