what fish would eat this?

i dont know about fish, but it looks like you could use an emerald crab for that bubble algae!
 
Pretty much nothing. one of the rabbitfishes MIGHT but best bet is aggressive manual control! Most fish won't touch it.
 
Anecdotal for sure but I we had allowed calurpa to overrun the rocks in a 40G tank. We pulled all we could off the rocks but couldn't get ahead of it.

Couldn't catch the Rabbit to move him, and couldn't find a shop that had one. Bought a Foxface - he ignored the stuff.

Moved a few rocks to the tank the Scribbled Rabbit was in. He ate every bit of all the algaes.

YMMV but it was the only fish I found that would eat the stuff.
 
I have both a foxface and a scribbled - and no green algae whatsoever!

But be careful - little fish may not get the idea right away. It took awhile for the fishies to "know" they could eat it.
 
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