all the bubble algae that I have seen varies from bright-green to almost black. There is some on the rock but the silver bubble look almost like oxygen bubbles to me. Try waving your hand above them. If they float off and to the surface it's just O2
(or possible C02 or some other gas).
Don't break the bubble algae bubbles in your tank. That can just release spores and cause a lot more bubble algae.
A lot of people hate the idea of any crabs in your aquarium but emerald crabs can help by consuming the bubble algae.