Black flatworm ID help

[rueric]

Would really love some help to id this!
I’ve recently had sps die off and wondering if this is the cause.
I’ve tried two treatments of flatworm exit in the past but it never really helped

 

[vetteguy53081]

Would really love some help to id this!
I’ve recently had sps die off and wondering if this is the cause.
I’ve tried two treatments of flatworm exit in the past but it never really helped

Pic is fuzzy to tell as it could also be a slug. Need clearer pic under white lighting to confirm. Can be an Aglaja sea slug or similar

 

[rueric]

It has two small tails much like a flatworm

 

[rueric]

Pic is fuzzy to tell as it could also be a slug. Need clearer pic under white lighting to confirm. Can be an Aglaja sea slug or similar

 

[vetteguy53081]

I see them now. They are acoel flatworms.
While they are not harmful as red planaria, they in numbers can smother bases of coral and block the needed light for production of zooxanthellae which is their energy source.
Removal can be accomplished by siphoning them with a 3/8" tubing into a nylon stocking and discard
OR
Add a wrasse such as Yellow coris, 6 line, lunare or malanurus OR even a springieri damsel which will eat them

With the number you have, for the next 2 weeks you will have to look for eggs and scrape off as there is likely some and would be future acoels. Eggs are really tiny

 

[rueric]

I see them now. They are acoel flatworms.
While they are not harmful as red planaria, they in numbers can smother bases of coral and block the needed light for production of zooxanthellae which is their energy source.
Removal can be accomplished by siphoning them with a 3/8" tubing into a nylon stocking and discard
OR
Add a wrasse such as Yellow coris, 6 line, lunare or malanurus OR even a springieri damsel which will eat them

With the number you have, for the next 2 weeks you will have to look for eggs and scrape off as there is likely some and would be future acoels. Eggs are really tiny

Any chemical solutions for eradication?
I have a coral fishless qt tank

 

[vetteguy53081]

Any chemical solutions for eradication?
I have a coral fishless qt tank

Its the last thing you want to do. I mentioned siphoning them. If you go chemical which may upset coral, you will have to siphon dead ones daily anyway to remove potential Toxins.
Salifert flatworm exit worms, But realize the risks mentioned.

 

[Pridedcloth3]

Its the last thing you want to do. I mentioned siphoning them. If you go chemical which may upset coral, you will have to siphon dead ones daily anyway to remove potential Toxins.
Salifert flatworm exit worms, But realize the risks mentioned.

The toxins are easy to deal with. The thing with flatworm exit is sometimes you have to go easy above the recommended dose. I bought a cheap Amazon canister filter with just 2 trays filed both with activated carbon and had it on standby until every one of the worms were floating in the water column dead then fired up the canister and let it run for a day. Coral never missed a beat but snails were paralyzed until all toxins were removed.