Help ID of 3 different types /colors of sponges that hitchhiked on live rock

[Addicted2Reef’n]

Curious if anyone has seen these sponges before. The large grayish white sponge is the same color as a pineapple sponge but much larger at 6” x 3” underside of rock. I acquired this rock from lfs. I saw what I thought was grey putty on the underside of rock and turned out to be this sponge. The second photo shows the two other sponges - one is orange and has a growth that sprouts up and dangles in the current. The third sponge was a purple color but now that it is in higher light I presume it has turned black but still alive. The large and black sponge have been in my 2 year old system for a year w no problems but just moved to this 2 month old system last month.

 

[Addicted2Reef’n]

I circled the sponges in 2nd pic for help ID.

 

[dan’s tanks]

1st pick looks like some form of tunicate.

 

[Addicted2Reef’n]

1st pick looks like some form of tunicate.

Ok I am not sure what differences are but I will do some research. Thx for your input appreciate it. Been active in this hobby for two years and still amazed 1/2 the stuff that pops up in my tank.

 

[ISpeakForTheSeas]

1st pick looks like some form of tunicate.

Ok I am not sure what differences are but I will do some research. Thx for your input appreciate it. Been active in this hobby for two years and still amazed 1/2 the stuff that pops up in my tank.

The first does somewhat resemble a colonial tunicate, but it's a sponge (some differences discussed below):

Sponges and colonial tunicates can sometimes be incredibly difficult to tell apart (at least externally and without a microscope), but here's some advice for this particular situation:

colonial tunicates are typically very uniform, with all of the in-current siphons being roughly the same size and shape and being distributed very uniformly as well; sponges tend to be less uniform and more haphazard with their in-current siphons;

OP, I'll try and see if I can figure out some ID's when I get the time here, but be aware that sponge ID without a microscope and/or DNA can be difficult and/or inaccurate:

Anyway, here’s a good Sponge ID resource for anyone who’s interested- as mentioned, though, sometimes DNA is the best indicator for telling sponges apart:
https://www.fao.org/3/i7773e/i7773e.pdf And, here’s a decent example of why sponge ID by non-microscopic sight is not always reliable:
https://www.researchgate.net/figure...rating-variations-in-shape-and_fig6_248716402

 

[Addicted2Reef’n]

The first does somewhat resemble a colonial tunicate, but it's a sponge (some differences discussed below):



OP, I'll try and see if I can figure out some ID's when I get the time here, but be aware that sponge ID without a microscope and/or DNA can be difficult and/or inaccurate:

Thanks for your feedback. I have read just enough to understand that sponge identification if VERY complicated and many factors must be satisfied to make a positive id. I guess I should have asked if this looks familiar to any one else’s sponges in their system and did they know what it was. I also assumed that the diversity of sponges would be limited in the reef aquarium hobby to a familiar few just as other such animals that pop up in our reef tanks are. Thanks so much for you taking your time to look into it.