Snail-like creature (pest?) on zoa and blasto

[oceanicwave]

Hi everyone!
Greetings from Indonesia!

It's my very first post here.. I need a help on identifying these annoying creatures:



They kinda look like a tiny shelled snail..

Around 2 weeks ago I noticed my zoas and palys aren't opening up and also some went missing.

Few days ago I randomly inspected my tank in the middle of the night and saw these creatures...

Some colonies of blasto right next to these zoas are also missing flesh, little by little, day by day, even after dipping... I really love these zoas, palys and blasto, as I have them for 2 years now.. please help. Thanks in advance!

 

[Reefer Reboot]

Hard to tell in the videos but by the movement in the second video try looking up Ostracod and see if that could be it.

 

[ying yang]

Firstly hello and welcome to r2r,hope all is well.

Umm very hard with 3 and 9 second video ^_^

From little I saw im thinking to say look up colinista snail but sorry no clue other than that.
Maybe get longer video or a zoomed in clear picture off it in white light which will help others greatly to help you

 

[oceanicwave]

Hard to tell in the videos but by the movement in the second video try looking up Ostracod and see if that could be it.

 

[oceanicwave]

Hard to tell in the videos but by the movement in the second video try looking up Ostracod and see if that could be it.

Hi! Thanks for you reply. I just googled the Ostracod and they're kinda similar... But are they good guys or bad guys?

 

[oceanicwave]

Firstly hello and welcome to r2r,hope all is well.

Umm very hard with 3 and 9 second video ^_^

From little I saw im thinking to say look up colinista snail but sorry no clue other than that.
Maybe get longer video or a zoomed in clear picture off it in white light which will help others greatly to help you

Hi! Thanks for your reply!
I'm sorry for the bad vid. I'm gonna post another longer vids but it's actually same quality... But i hope it's more visible...


Btw it could be colinista (just googled it) but I'm still not sure...

 

[oceanicwave]

Here are some longer videos.. sorry this is all i can get from crappy phone camera

 

[Reefer Reboot]

Hi! Thanks for you reply. I just googled the Ostracod and they're kinda similar... But are they good guys or bad guys?

Reported to be harmless.

 

[The_Skrimp]

I had something that looked almost exactly like these on my zoas a while back. They were also IDed as Ostracods.
Mine appeared out of nowhere and then I had hundreds that would come out at night for a couple weeks and then disappeared as quick as they came. They didn't really seem to hurt anything.

 

[ying yang]

Woodlice like bugs

Isopods

youtube.com

From looking your latest video,looks very similar to one's I had,just different colour.
Mine I just see in the sandbed and after over a year never seen them do no harm.
Usually where we find these little bugs is what they eat.
Find on coral = eating coral.
Find on fish = fish parasite.
Find in sand/rocks = detritus/algae eater.
This not always the case but very often in my opinion