Harpacticoida is an order of copepods, in the subphylum Crustacea.

Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.

Various members of the order Harpacticoida are found in the marine environment and in fresh water.

All year round.

Widespread in British waters, both coastal and inland.

Status in Leicestershire and Rutland not known.