Cylindrical Bristle Clusters (no, nor us) have been installed at Lukely Brook, near Carisbrooke and at Wroxall Stream.

They're like bottle brushes in the water - ensuring fish can swim upstream and over weirs.

Scroll down for a video...

The Environment Agency, which put them in, says the technology is really important for the health and biodiversity of the Isle of Wight's rivers.

Isle of Wight County Press:

Installing the Cylindrical Bristle Clusters on the Isle of Wight

The bristles create access for fish even when water levels are low, as demonstrated below, by two stunt fish at Southampton University.

And if you are concerned it might only work for small fish (these are roach of about 15-20cm), similar bristles on the river Arun are already being used by large chub, measuring 30-40cm.