Help identifying strange white thing

[pal0]

I'm currently setting up my first saltwater tank and, after adding 2 new live rocks the next day i've noticed these white things in my tank, i'm guessing it's some type of mold. can anyone help me identify them?

 

[ISpeakForTheSeas]

Welcome to Reef2Reef!

Some interesting things there. Can you describe these things a bit for us:

-Are they hard or soft?

-Do they move around?

-Do they open and close/expand and contract/extend and retract?

-Do they have any noticeable openings/holes in them?

-Any other descriptions/details you can add about them?

The big one/big part at the top of the pic is throwing me off or I would probably guess sponges, as I see at least one definite tube shape.

 

[EeyoreIsMySpiritAnimal]

I'm currently setting up my first saltwater tank and, after adding 2 new live rocks the next day i've noticed these white things in my tank, i'm guessing it's some type of mold. can anyone help me identify them?

When you say "live rocks", what do you mean? Where was the rock before you put it in your tank?

 

[bryan47caveman]

It looks like a crystal, what’s the texture like, soft or hard?

 

[InsaneClownFish]

It could be a sponge-
Hard? Soft? Does it move when you deny it light? Does it move when you change flow? Does it move or retract when touched?

 

[bryan47caveman]

I’m fairly new but can crystal form in a tank given the right conditions?

 

[bushdoc]

Looks very spongy to me, but it could also be a tunicate.

 

[EeyoreIsMySpiritAnimal]

I’m fairly new but can crystal form in a tank given the right conditions?

No.

 

[pal0]

Welcome to Reef2Reef!

Some interesting things there. Can you describe these things a bit for us:

-Are they hard or soft?

-Do they move around?

-Do they open and close/expand and contract/extend and retract?

-Do they have any noticeable openings/holes in them?

-Any other descriptions/details you can add about them?

The big one/big part at the top of the pic is throwing me off or I would probably guess sponges, as I see at least one definite tube shape.

sure: they're soft and aren't attached to anything, they don't move on their own only with currents.
I thought it was some kind of mold and as i am writing this their number decreased

 

[pal0]

When you say "live rocks", what do you mean? Where was the rock before you put it in your tank?

i bought 2 new rocks from a fish store because i thought there wasn't enough in the tank and they were placed inside of a sump. also sorry if i caused any misunderstanding my english isn't that great

 

[InsaneClownFish]

Looks very spongy to me, but it could also be a tunicate.

Agreed.

 

[ISpeakForTheSeas]

I'm not sure, but I'd guess either a sponge or some seriously bleached macroalgae pieces.