Please tell me what these things are!

[NanCrab]

I thought they were “good” snails but they’re getting bigger and more prolific, I’ve got 4 or more of them running around in the daylight. The file fish and African Blue stripe cleaner wrasse nip at them. Are they good pest or bad? Friend or foe....? Inquiring minds need to know The slug looking things on the glass brush, in the corner above the rock and the slug side on the front glass I can’t remember what Shawn told me he thinks they are but they’re growing

 

[hzheng33]

looks like stomatella snail

 

[jcook54]

Stomatella. Good guys.

 

[NanCrab]

looks like stomatella snail

That’s what Shawn said, I couldn’t recall on my own but that’s it. How big do they get? And why do the file and wrasse try to eat them?

 

[hzheng33]

That’s what Shawn said, I couldn’t recall on my own but that’s it. How big do they get? And why do the file and wrasse try to eat them?

Maybe 1” long

 

[NanCrab]

Ok thanks. But they’re good right?

 

[Rickdareefa]

Im pretty sure those are spirorbid worms not stomellas. They are harmless filter feeders really more of a nuisance than anything

 

[NanCrab]

Im pretty sure those are spirorbid worms not stomellas. They are harmless filter feeders really more of a nuisance than anything

Not the spirals the slug things. They kinda blend into the color of the algae scraper

 

[sharis100]

Stomatella | Melev's Reef

Many people ask about a snail or slug with a half-shell on its back. They are called Stomatella, and are fast moving slugs. Their shell is similar to a fingernail in shape, which covers the head and torso of the creature. They are found moving about the rockwork especially at night, and are an...

www.melevsreef.com

 

[Rickdareefa]

Ok i see now what you are looking at. The sprirobids are much more annoying tho

 

[Fishtile Exotics]

yeah those are stomatellas. What usually happens is they breed out of control and then the whole population collapses and they disappear. Theyre beneficial and very good algae eaters

 

[Shawn]

My population hasn't disappeared, but it's definitely gone down, especially since my troccus snails started breeding. Stomatella was one of my very first hitchhikers from a piece of live rock

 

[ActiveAngel]

Agreed; definitely Stomatella. And yes, they are good guys