fish leech?

fish leech?

Observation - fish leech?. Description: Found inside the disguarded shell of a fresh water pearl mussell in the shallows of the river Deel in Ireland.(sorry for the poor quality pic!) Can anyone please identify it?

Found inside the disguarded shell of a fresh water pearl mussell in the shallows of the river Deel in Ireland.(sorry for the poor quality pic!)
Can anyone please identify it?