What's this algae

[PeterEde]

Since sending both my rabbitfish on holiday this has started to grow.
What is it? Will it be a nuisance if not controlled early?
What will eat it that won't grow huge?

 

[Timfish]

It's one of the calurpa species, probably C. peltata. Calurpa has toxins to make it unpalatable for herbivores to eat so manual removal is really your only option. You might find this article interesting:

A Look at the Macroalgae Caulerpa

By James W. Fatherree Of all the various kinds of macroalgae that can be added to a marine aquarium, the most common are the species belonging to the genus C

reefs.com

 

[PeterEde]

It's one of the calurpa species, probably C. peltata. Calurpa has toxins to make it unpalatable for herbivores to eat so manual removal is really your only option. You might find this article interesting:

A Look at the Macroalgae Caulerpa

By James W. Fatherree Of all the various kinds of macroalgae that can be added to a marine aquarium, the most common are the species belonging to the genus C

reefs.com

I had 2 rabbits that ate caulerpa. I recently sent away. Only coming on now with them gone

 

[AlgaeBarn]

I had 2 rabbits that ate caulerpa. I recently sent away. Only coming on now with them gone

Do you have other herbivores in the tank like tangs? They typically like to eat it if the tang's mouth's are large enough to eat it

 

[PeterEde]

Do you have other herbivores in the tank like tangs? They typically like to eat it if the tang's mouth's are large enough to eat it

It's only a 30 gal tank which is why I moved on the Rabbitfish.

 

[AlgaeBarn]

It's only a 30 gal tank which is why I moved on the Rabbitfish.

You can try a tuxedo urchin, but sometimes they can be hit or miss when it comes to caulerpa- Raven