What is this in my tank?

[krystalstarr]

Took this two things out. One looks kinda like a string. Not moving. The other looks like a tiny shell
Are the dangerous. Already placed them in a cup but I don’t know if these means something is already spreading in tank?

 

[ISpeakForTheSeas]

The shell is some kind of snail - is the opening round like a circle, or is it more oval/slit shaped? If it's round, it may be a Turritellid snail (they're filter feeders), if it's more oval/slit shaped, then it may be some kind of Terebrid snail (predatory, but typically towards marine worms, as I understand it). It may be mostly safe for your tank either way.

Edit: I can't see the string very well, but it looks like it may either be a tube of something or a kind of worm.

 

[krystalstarr]

The shell is some kind of snail - is the opening round like a circle, or is it more oval/slit shaped? If it's round, it may be a Turritellid snail (they're filter feeders), if it's more oval/slit shaped, then it may be some kind of Terebrid snail (predatory, but typically towards marine worms, as I understand it). It may be mostly safe for your tank either way.

Edit: I can't see the string very well, but it looks like it may either be a tube of something or a kind of worm.

If it is a worm is that dangerous?

 

[krystalstarr]

If it is a worm is that dangerous?

Took this two things out. One looks kinda like a string. Not moving. The other looks like a tiny shell
Are the dangerous. Already placed them in a cup but I don’t know if these means something is already spreading in tank?

 

[ISpeakForTheSeas]

If it is a worm is that dangerous?

It would depend on the species of worm.

 

[AydenLincoln]

The photo is fuzzy but does it have black stripes? If it does it’s probably this peanut worm or at least part of it despite looking thin. https://inverts.wallawalla.edu/Sipuncula/Phascolosoma_agassizii.html

 

[1epauletteshark]

Is it very thick at the bottom?

 

[krystalstarr]

It was extremely thin like a little thinker than string. Thicker on one side then the other though

 

[krystalstarr]

Is it very thick at the bottom?

No strips. Just looked stringy. Did not look like a worm to me but I’m new at this.

 

[1epauletteshark]

No strips. Just looked stringy. Did not look like a worm to me but I’m new at this.

Hmm ok