Microbe ID

[Shackleton]

Hi, wondering what these tiny microbes are in my reef tank, viewed here through a hand lens. They have a distinctive shape. Thanks!

 

[Crabs McJones]

Acoel flatworms

 

[Shackleton]

Good guys?

 

[Crabs McJones]

They don't harm anything. They can reproduce quickly though and smother coral. Fish will eat them, specifically wrasse.

 

[Wolf89]

They eat pods nothing else though

 

[CindyKz]

IME, melanarus, yellow coris, pink streaked, four and six line wrasses all eat them. I have had them in both my tanks with no issues.