Unknown (mayfly) nymph?

Unknown (mayfly) nymph?

Observation - Unknown (mayfly) nymph?. Description: Not sure if this is a mayfly nymph. Very olive green in colour, with no visible gills. Three wavy tails apaprent and head shape strange for a mayfly

Not sure if this is a mayfly nymph. Very olive green in colour, with no visible gills. Three wavy tails apaprent and head shape strange for a mayfly