What is this pond weed? Is it a friendly plant .. or not?
This submerged weed has been developing at a rapid pace in our pond over the last month or so. It is now appx six inches in diameter, growing in a loose ball shape. Can anyone identify it for me and let me know whether it is friendly or invasive? If I need to get rid of it, can I simply remove it? It would be great to know if it is a friendly weed, too. Many thanks indeed!

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It could be ivy leaved duckweed. Apparently it is less invasive than common duckweed.
Thank you so very much for your reply!
I recognize that and will try and remember (or look up) what it is if nobody else IDs it.
Not a duckweed I don't think
In the sticks near Peterborough
Nut, is it Willow Moss?
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
I don't recognize the name Dove but it may be that I never had a name, just the plant.
I'll check out willow moss.
In the sticks near Peterborough
Hi Nutcutlet and Dovefromabove! I can confirm that this weed is called Ivy-leaved Duckweed. It's not as invasive as ordinary duckweed and apparently grows fairly slowly -- comparatively. Thank you so much for your time and kind help!
Thanks mags. I'll have to look that one up now.
In the sticks near Peterborough
That's the one, I haven't got any now and probably never gave it a name when I had.
In the sticks near Peterborough