Spionid worms or vermetid snails???

[dommythaGOAT]

Posted are a few photos of what I believe to be either spionid worms or vermetid snails. I am leaning towards the spionid worms because I have not seen any “web like” material come out of the end, but if anyone knows please let me know? if they are spionid worms, are they harmless? Thank you!

 

[Kristopher Conlin]

Looks like vermetid snails to me.

 

[dommythaGOAT]

Looks like vermetid snails to me.

It looks like that but I was reading that vermetid snails cast a web like net out for feeding I believe and there are lots and lots of them in my tank and I’ve never seen that. Is this true or do they not always do this?

 

[vtecintegra]

My vermetids do not put out webs.

 

[fishface NJ]

vermetid

 

[EeyoreIsMySpiritAnimal]

It looks like that but I was reading that vermetid snails cast a web like net out for feeding I believe and there are lots and lots of them in my tank and I’ve never seen that. Is this true or do they not always do this?

Not all vermetids cast noticable webs. The things in the pics are definitely vermetids.

 

[Northern Flicker]

Not all vermetids cast noticable webs. The things in the pics are definitely vermetids.

Just out of curiousity, what gives it away - is it the spiral shell?

I've had both, I believe I was able to rid myself of spinoids by removing the two frags which they seemed to come in on. Tell tale sign was the tubes with the large "antennae" coming out.

 

[Kristopher Conlin]

Just out of curiousity, what gives it away - is it the spiral shell?

I've had both, I believe I was able to rid myself of spinoids by removing the two frags which they seemed to come in on. Tell tale sign was the tubes with the large "antennae" coming out.

Spionid worms burrow into rock and coral skeleton. Vermetid snails have that telltale spiral shell at the base of the stalk.