What is this pest in my tank

[Medmondsii]

Hello guys..
I'm start to see a bunch of whatever this is. Lol in my display tank. Is it a pest? Will it harm my fish? If so, how do I get rid of them?

 

[Mikedawg]

Looks a lot like a medusa worm, actually a species of cucumber which means it likely has toxins. I'd use a turkey baster to remove it unless you want to keep it as a filter feeder. Might find this interesting: https://reefs.com/magazine/aquarium-invertebrates-the-medusa-worms/

 

[Medmondsii]

Looks a lot like a medusa worm, actually a species of cucumber which means it likely has toxins. I'd use a turkey baster to remove it unless you want to keep it as a filter feeder. Might find this interesting: https://reefs.com/magazine/aquarium-invertebrates-the-medusa-worms/

Stay or go?

 

[Double monti 61]

Maybe it cannot find enough food and has come out to search for more and do you always leave your light in total blue mode

 

[Medmondsii]

Maybe it cannot find enough food and has come out to search for more and do you always leave your light in total blue mode

Not all the time. My tank is now fallow due to and outbreak.

 

[Double monti 61]

Hey does the algae on the back of the tank resemble snot if it does than try to remove during water changes.

 

[Medmondsii]

Hey does the algae on the back of the tank resemble snot if it does than try to remove during water changes.

Will do.. before the fish get out of qt. I will do a complete cleaning on sump and dt.