Good or Bad ?

[SHNICI]

Having this for free from LFS still can't be sure is it for the DT or the sump, or just throw it away? It don't look like the whelks, and the snorkel don't have tattoo I think, it's orange yellow body but can't get what's exactly. from the LFS say just snail ...

 

[Chefwheredyougo]

looks like a conch

 

[SHNICI]

it's about 1cm big at the moment, it look like to me too, but I hope isn't whelk you know. But still not sure, and can't leave it that way even in the sump, as there have another snails, not that good as a CUC, but still don't want whelk to kill them

 

[Chefwheredyougo]

@vetteguy53081
Maybe he can help

 

[Fishurama]

It is a whelk IMO , It looks like a type of Nassarius snail mixed with a conch which confuses many. So its ultimately up to you.
But to play devils advocate this is to disprove why i think it's a whelk and why it's confusing.
" Figure 4. This small columbellid (Euplica or Pyrene species) is often misidentified as "Strombus maculatus." It is a whelk look-alike that is a highly beneficial grazer found in many reef aquaria. Notice that although it has a siphonal notch and visible siphon, shown in the left image, it really doesn't have a siphonal canal. It grows to a length of up to 8 mm (0.3 in). "

Whelk source

 

[vetteguy53081]

Tiger sand conch. They benefit a reef tank by burrowing and plowing through sand bed aerating and cleaning as they go. They are great at removing detritus and oxygenating dead spots, helping to eliminate red or green slime algae.

 

[SHNICI]

It is a whelk IMO , It looks like a type of Nassarius snail mixed with a conch which confuses many. So its ultimately up to you.
But to play devils advocate this is to disprove why i think it's a whelk and why it's confusing.
" Figure 4. This small columbellid (Euplica or Pyrene species) is often misidentified as "Strombus maculatus." It is a whelk look-alike that is a highly beneficial grazer found in many reef aquaria. Notice that although it has a siphonal notch and visible siphon, shown in the left image, it really doesn't have a siphonal canal. It grows to a length of up to 8 mm (0.3 in). "

Whelk source

Thx, but like @vetteguy53081 say it isn't bad in that case.
If I do understand properly from all what I read about the Whelks, them eyes like aren't that way showed on the antennas, on this one I can see definitely the eyes on 1/3 of the antennas, the second think, which separate it from the Whelks, is actually the proboscis like or in my case it is the gut, and the siphoning/snorkel tube is separate. You can see the gut (I think) on the last 3 photos I upload, sorry if the quality isn't been good enough to be recognised.
Please @vetteguy53081 correct me if I'm wrong in something I do write here about the Whelks, just I want to learn much as possible, not to ask stupid questions. Like the Whelks don't have them eyes on long antennas, or they are at the 2/3-3/4 at the end of the antennas, and the Whelks eyes aren't that good visible like on the good snails. The Whelks lack the long siphoning tube, it's actually proboscis there with the gut in? The last think, which every one can clearly recognise the whelks is the proboscis on the whelks (the long siphoning tube) have this tattoo like on it?
Excuse me if I'm wrong in that all, and please correct me to get it properly.

Regards