what is this?

[muffinman356]

What is this?

 

[Jml32788]

Kinda looks like bubble algae. Do a google image search on bubble algae and see if that is what it looks like. Its kind of hard to tell in your picture.

 

[Salty B]

Kinda looks like dino's to me.

 

[salt_for_brains]

+1 on looking like Dino's

 

[muffinman356]

Is it harmful?

 

[Salty B]

Not good! I gotta run so dont have time to type but if you use the search feature on this site and look up dinoflagellates you'll get some good info.

 

[MitchReef]

Often seen as part of a cycle....read up and you ought to be able to deal with them....