Egg or jellybean?

[GuOD]

Hey everyone,

I noticed this thing in my tank today (never seen it before). It's hard and lodged in so I couldn't remove it. Any ideas welcome. To me it looks like an egg or a jellybean

 

[roka64]

It's kind of hard to see. If I had to guess from the pic, I would say bubble algea (the greenish/dark part) not too sure on the yellow thing. Is it part of it? Some sort of sponge...?

 

[Ziggy953]

I agree with Roka...hard to make out but if I had to say something I would say bubble algae also...