What are these?

[Tom800]

So about two weeks ago, I put in 50 berghia nudibranchs. I’ve been expecting to see babies at some point, but I looked at my tank just now and I see all these guys in the tank. I’ve never seen them before and they are all around the area. I did put the nudibrangs in. But they look different And red. But I don’t know if these are just what they look like when they just hatch. Let me know what you think these are. I don’t like coincidences which is why I’m not sure what to think here. I’ve never seen these before in my tank.

 

[Justfebreezeit]

They are red? In that case they look like a fire worm

 

[rayadog]

polychaetes for sure. Likely run of the mill bristleworms but like a lot

 

[Subsea]

So about two weeks ago, I put in 50 berghia nudibranchs. I’ve been expecting to see babies at some point, but I looked at my tank just now and I see all these guys in the tank. I’ve never seen them before and they are all around the area. I did put the nudibrangs in. But they look different And red. But I don’t know if these are just what they look like when they just hatch. Let me know what you think these are. I don’t like coincidences which is why I’m not sure what to think here. I’ve never seen these before in my tank.

How big is the tank and how many aptasia does it have to put 50 nudibrances?

Also, I can’t identify much of anything with the blue light. White for identification.

 

[Tom800]

How big is the tank and how many aptasia does it have to put 50 nudibrances?

Also, I can’t identify much of anything with the blue light. White for identification.

It’s 180 gallons and there’s a medium to heavy outbreak of aptaisa. The nudibranchs are doing pretty good, I do see them working every night.

 

[Tom800]

polychaetes for sure. Likely run of the mill bristleworms but like a lot

Yeah, they have a bit of a reddish/rust colored tint to them – I’ve never seen them before, any harm that they’re in the tank?

 

[rayadog]

They’re not often out in droves or during the photoperiod. They can start out and multiply from small sizes if you hadn’t seen them before. Detritivores so just another member of clean up crew. Some fish will slurp them up and you’ll never see them if that’s what you desire. But these guys shouldn’t harm anything if not just unsightly.