Yes It looks like bubble algae. It should be pretty easy to remove. I would use my finger nail to gently remove them without popping them. You could also use tweezers. If you can do this out of the tank it would be better
I noticed while doing my tank clean up from the vermited snail I had everywhere that I also have bubble algae. I have never had luck with the emerald crab route on past tanks so not sure I even want to try it again.