Strange pond creature

Strange pond creature

Observation - Strange pond creature - UK and Ireland. Description: We built a pond about a month ago and this strange creature has appeared. At first, we thought it was a caterpillar or slug which had fallen in but it has been there for a couple of days now so assume it is something else. Any help welcome!

We built a pond about a month ago and this strange creature has appeared. At first, we thought it was a caterpillar or slug which had fallen in but it has been there for a couple of days now so assume it is something else. Any help welcome!