Hitchhiker invasion - infestation

Hey all I need some help Iding this little bugger.

I have recently noticed it in my tank, and about the same time frame I have lost an entire Zoa colony and lost all but 2 heads on a second in about 3 weeks.these heads are completely disappearing, I'm not noticeing damaged skirts or anyhting like that , just over night one or more heads just disappear.
I did some fresh water dipping on the zoas and 2 rocks in the tank, and here is the results

So a couple of questions:
1st..Do you think this is the culprit eating my Zoas?
2nd.. How do I get rid of them? Assumeing the answer is freshwater dipping how far do I go?
Im running a 55 gal with 40 lbs of live sand mix and about 90 lbs of live rock.
2 good Zoa colonys left ( I hope to keep it that way)
Hammer
Torch
Candy cane
1 mushroom
Tomini Tang
Clown Fairy wrasse
pair of false perc clowns and a diamond goby
misc snails and 3 hermits. Got rid of the peppermint shrimp about a week ago thinking theey were eating them as it started about the time I put them in , but that wasnt the case,
thanks for your help in advance

 

i've got a few of them in my tank (or at least something purdy near identical) and i haven't had any troubles with my corals.

 

I have those too and think they are harmless turbos but I did own a zoa colony 2 years ago that died off the same way Arvins described. I hope they are only turbos....

 

Those snails aren't eating your zoanthids. As mission said, your Bucket-O-Snails are all Collonista species, except I see a single Stomatella in the middle. They are all algae eaters.

Cheers,


Don

 

it is possible one set of the misc snails had kids! I have a tank full of bumble bee snails off of 2 I started with.

 

Highly possible. It is very easy and common to see snails spawn in home aquariums.

 

looks like those are benficial snails to me as others said....wish i could get a small spawn of those goin in my 90 gal

 

Thanks all,well if they are good things then the mystery continues on the vanishing zoas...but that is another thread in another forum, thanks again

 

If you ever want some, come up to WI, I have tons of these in my 90.

These are beneficial.