Unknown larvae

Unknown larvae

Observation - Unknown larvae - UK and Ireland. Description: This was swept from the edge of an estuary, close to a grassy, saltmarsh area. Approx 15mm in length. Please can someone advise what species this is as I am struggling to find anything similar, thanks.

This was swept from the edge of an estuary, close to a grassy, saltmarsh area. Approx 15mm in length. Please can someone advise what species this is as I am struggling to find anything similar, thanks.