Blue stuff on my live rock

[Omi21]

Can anyone help me out in figuring out what this blue stuff is it showed up on my live rock.

should i be worried and is it harmful?

first image is my live rock and the second image i found online it is very similar.

New to the saltwater aquarium.

 

[minus9]

Sponge. If there's one color of sponges that hobbyists seek, it's blue, so congratulations.

 

[Auquanut]

I agree. Sponge. Looks great.

Welcome aboard by the way!

 

[Billdogg]

^^^What both of them said^^^

You'll also have red, yellow, green, black, and white eventually. Although some can attempt to overgrow corals, they are easy to keep in check. Most are just fine IMO.

Congrats, and Welcome!!!

 

[fishguy242]

ditto
welcome to the reef
nice colors there

 

[X-37B]

This is why I love live rock!
Nice color too.
You never know what may grow out of live rock.

 

[Joel Rorem]

Hi I have this stuff, it’s a sponge?

 

[fishguy242]

Hi I have this stuff, it’s a sponge?

looks like it...

 

[jda]

Yes. It will likely die. If it does, do not take it personally. The stuff needs strong full-spectrum light and water parameters near ocean level. Most of the low-light, heavy blue tanks of today where people add in waste products to raise test kit levels are not good places for this sponge to thrive.

 

[ISpeakForTheSeas]

Hi I have this stuff, it’s a sponge?

Welcome to Reef2Reef!

Yes, that's a sponge; as mentioned above most sponges don't fare very well in our tanks (though a few do, with some doing well enough to be somewhat invasive). Assuming that it's not one of the invasive ones, if you want to try and keep it growing in your tank, I'd suggest reading through my post in the thread linked below:

Help with ID

Recieved lr from tbs yesterday. I have an ID question. Is the red encrusting stuff a sponge??? I also got some form of sps (hard to see).

www.reef2reef.com

 

[jda]

Also, even if you get it growing well, many fish will find it a tasty treat, including lots of angelfish.

I have a bit of blue and lots of bright yellow living the cracks where the fish cannot get to them.

 

[Reefkeepers Archive]

That is a stunning blue sponge!

 

[Joel Rorem]

Ok thanks, it running ramped in my tank a long with a green grass algae, red hard coating and lots of aiptasia, I have some critters to help get it under control