horse conch?

[andrewk529]

i think i purchased a miss-labeld fighthing conch at a LFS. upon further googling it seems as if i've introduced a predetory horse conch. the picture below is the unidentified "conch". Its mainly active at nite while burrying into my sand bed during the daylight.

 

[LoyalConvict]

My initial thought was a Jumbo cerith snail. . .

 

[andrewk529]

im leaning towards ....Latirus polygonus...gonna have to pull the snail out tomorrow looks like