Tiny white dots (with legs) on glass

[Scoot]

I've found 3 tiny white dots, with at least 5 "legs" around them at even spacing - they've moved since earlier today. Very, very tiny.

Can't get a photo - they're the size of the period at the end of this sentence.

Just curious - any takers?

 

[Fluff]

They are hydroid jellies. Or I've seen them called medusa hydroids. They aren't something I'd worry about. I had them and they are usually only seen in newer nutrient heavy tanks. They should die out on thier own.