Sponges?

[dochow]

Can anyone identify?

Good, bad or indifferent in tank?

 

[twilliard]

Pineapple sponges
Good

 

[mikesilverado8888]

Pineapple sponges
Good

What good do they do?

 

[Breakthecycle2]

Sponge Bob lives there.

 

[twilliard]

Live off of free nutrients in the water

 

[mikesilverado8888]

Sponge Bob lives there.

Oh stupid me lol

 

[Breakthecycle2]

Oh stupid me lol

Lol.

 

[gmastr85]

They are good... Filter feeders...

 

[constantflow]

Cool!

 

[mikesilverado8888]

Should one try to get some?

 

[dochow]

They just started growing about 2.5 months from tank start date

 

[cmcoker]

Should one try to get some?

Pineapple sponges will come and go. I wouldn't worry about adding them, they will just appear. Often in overflows, sump area, etc.

Now, If you wanted to add some of the pretty sponge specimens to showcase in your tank, then that's fine if you understand their requirements.