could some ID pls

[wrano]

Just wondering in anyone could tell me what this is, and is it good or bad.

 

[mejiggery]

are we identifing the green Caulerpa racemosa aka grape Caulerpa I think!!
or the brown thing thats in it? which i cant make out maybe another pic from diferent angle

 

[Aquabucket]

Bad type of macro algae ~ get rid off it now before its can spread! Try to add some chaetomorphia to your system to outcompete undesirble algae.

 

[tangey]

ya its a bad type

 

[sean48183]

That little brown thing looks like it could be some kind of nudibranch. Not sure if its good or bad though. Maybe someone else with xp on that one could chime in.

That is some fast growing caulerpa but I found it easy to prune. Doesn't vine out as bad as the little grape ones. If you really want to get rid of it though get a phosphate sponge in a hob filter and it will kill immedialtely. It did mine.