Unknown worm

Observation - Unknown worm - UK and Ireland. Description: About 10-15mm long. Found in sludge in garden pond.
About 10-15mm long. Found in sludge in garden pond.
Observation - Unknown worm - UK and Ireland. Description: About 10-15mm long. Found in sludge in garden pond.
About 10-15mm long. Found in sludge in garden pond.