Black Sponge ID?!

[ReyDeFarts]

I need some help with the ID of this sponge please. These few have not spread much, but seem to have grown a little.
It is attached to the rock base of a very large unknown Sarcophyton. I'll post pics of that toadstool at another time in the hopes of getting an ID as well. I need to get good pics of it.

 

[Alexander1312]

Looks very interesting - totally random but I uploaded the picture into Perplexity Pro to see if it can identiify it. This is what it said, curious what the real answer is though.

 

[ReyDeFarts]

Looks very interesting - totally random but I uploaded the picture into Perplexity Pro to see if it can identiify it. This is what it said, curious what the real answer is though.

View attachment 69314

Thanks for sharing that. I've never tried Perplexity. I appreciate the insight. I'll plug in that genus and species and see what more I can learn.

Although, it definitely does not have the ball shape indicated by the pictures of that species.

 

[Invictus]

@TheRealMadMax had these in his tank as well

 

[MichaelB]

Looks kinda intreststing. Cool in someways long as it doesn't become invasive. I have yellow stringy sponges in my tank. Has stayed in one spot over the last year and half so hasn't really bothered me.

 

[Patio]

My black sponge grows more blob like than your silo like towers. Maybe just different stages of growth but same type? It has been in the tank for several years and grown at a slow rate and mostly in shaded areas.Slow enough that I have let it ride.

Here is a pic from the web that shows similar blob like growth to mine: