Is this flatworm dangerous?

[Superoui22]

I have tons of these flatworms in my sump, never in my main tank. However I never saw it on my coral both SPS and LPS. In the past 6 months I lost only few SPS and LPS. I don’t think it relate to their growth which is much more

I am curious that should I let it be or try to get rit of them. Hopefully you can help me identify these flatworms. Thank you so much.

my tank info
Main Tank 84x24x24
Total 800l
Mixed reef tank

 

[vetteguy53081]

I have tons of these flatworms in my sump, never in my main tank. However I never saw it on my coral both SPS and LPS. In the past 6 months I lost only few SPS and LPS. I don’t think it relate to their growth which is much more

I am curious that should I let it be or try to get rit of them. Hopefully you can help me identify these flatworms. Thank you so much.

my tank info
Main Tank 84x24x24
Total 800l
Mixed reef tank View attachment 2881586 View attachment 2881597

These are acoel flatworms. While they are not a danger like red planaria, in numbers, they tend to smother the base of coral for its slime and block the light needed to feed the corals sugars known as zooxanthellae and hinder color and growth
Net as many as you can and siphon as many as you can with a 3/8” or 1/4” tubing then add a wrass that will eat them such as 6 line , yellow coris, lunare or melanurus
Also springieri damsel will eat them
For next few weeks look for eggs which are likely present and are very tiny and scrape off Outside of the tank

 

[Superoui22]

These are acoel flatworms. While they are not a danger like red planaria, in numbers, they tend to smother the base of coral for its slime and block the light needed to feed the corals sugars known as zooxanthellae and hinder color and growth
Net as many as you can and siphon as many as you can with a 3/8” or 1/4” tubing then add a wrass that will eat them such as 6 line , yellow coris, lunare or melanurus
Also springieri damsel will eat them
For next few weeks look for eggs which are likely present and are very tiny and scrape off Outside of the tank

Thank you very much for your advise.