What is this?

[cal91666]

They are about the size of a pencil eraser.

 

[michealprater]

Looks like bubble algea from what I can tell.

 

[tyler]

is it spherical?

 

[AmekaAquatics.C]

Looks to me like it's a: ventricaria venticrosa, aka Green Bubble Algae.

They reproduce by growing thousands of 'little bubbles' within themselves, than exploading out the babies.

It's best to remove them via siphoning.

Surgonfish, rabbitfish and crabs, and the (ercolania) sea slug's are the main herbivores that will eat them.

 

[cal91666]

Thanks AmekaAquatics.com ................. that kind of precise info is a darn good way to earn a customer. and some kudos.

 

[kribbz]

emerald crabs eat it right up.