safe or predator snail?

[Marc G-L]

UNS 125 gal tank. UV, fuge with amphi and copepods plus Ulva, GHA and a little red dyno patch.
I bought a few of these ( see video) from my LFS. They called them large snorkel snails. They do remain in the gravel until nighttime, or if feeding tank and a fair amount of particles are generated, they surface. Do great job of moving 3-4 in DSB. Looks like Godzillia pushing up gravel as they rise. Shell shape live an Olive snail but have that long breathing tube. I've unexpectedly lost a few mex turbos, astrea snails and a larger Halloween crab in the past month. All params are stable and with in range except phos. It did hit 0.46.
Got that down with 30% h20 exchange and phosguard. Only worms in tank are a few penut worms on glass and 2 ghost worm planaria 4 months after start up.

 

[Baldyreef]

olive snail, if i were you id take it out, they clean out all the fauna in your sandbed and will definetly go after your clean up crew