Small snails on new coral

[Dutch_Mill]

I've had some of these snails in my tank for a while without me ever introducing them. Probably hitchhiked on a coral or stone. But now i've bought a new coral and a whole bunch of these came off. Are they baby banded trochus snails? Or some kind of posers? Size is about 5mm (1/5" ish).

 

[xdcbenoitxd]

I've had some of these snails in my tank for a while without me ever introducing them. Probably hitchhiked on a coral or stone. But now i've bought a new coral and a whole bunch of these came off. Are they baby banded trochus snails? Or some kind of posers? Size is about 5mm (1/5" ish).

Kind of looks like spirorbid worm. Definitely not colostina snail. Baby trochus wouldn't have those little tentacle looking things.

 

[Dutch_Mill]

Kind of looks like spirorbid worm. Definitely not colostina snail. Baby trochus wouldn't have those little tentacle looking things.

This was the only picture I had in my camera. I don't actually mean the little white worms, but the actual snail they are living on. But I suppose these are Collonista sp?

Some extra pictures;

 

[WheatToast]

This was the only picture I had in my camera. I don't actually mean the little white worms, but the actual snail they are living on. But I suppose these are Collonista sp?

Some extra pictures;

Looks like baby Trochus snails, at least based on Google images. Odd since these snails release their eggs and sperm onto the water column which are usually consumed or filtered out.

 

[Dutch_Mill]

Baby Trochus or Collinista, both seems fine so I'll add these to my DT rather than the pest tank.

Thanks!