A VAMPIRE fish has been captured on video latching onto the Diglis Fish Pass window.

In the video, you can see the vampire fish, or sea lamprey, latching on to the window, displaying its many teeth, before swimming away from the glass.

The footage was captured by Unlocking the Severn, which is behind the creation of the Diglis Fish Pass.

READ MORE: Twait shad captured swimming past Diglis Fish Pass window

The purpose of a fish pass is to allow fish to move past manmade blockages in water. In Diglis, the weir means that many fish looking to travel upstream struggle due to the two-metre separation.

The pass consists of 11 small pools, each just 20 cm higher than the last, making it more manageable for the fish to swim through.

The fish detect the stream of water in the river and can travel upwards, with walls in each pool relieving some of the force created by the water. 

READ MORE: Take a look inside the Diglis Fish Pass

The Diglis Fish Pass relies on volunteer staff who provide tours that can be booked via the Unlocking the Severn website.

The tickets are free, but are very popular, with tickets disappearing quickly.

There are still two drop-in dates in May, on Saturday 21 and Tuesday 31.

The project was set up to save the endangered twait shad species.

For more information on Sea Lampreys, you can visit www.unlockingthesevern.co.uk/2021/10/25/focus-onlampreys/.