how the...?!

ChgoGoodGirl · Mar 10, 2021

found this little guy swimming around my tank. He was easy to pull out and I was able to grab some pics. It's the size of a baby brine shrimp and kind of looks like a BBS, only thing is... I've NEVER added/fed BBS to this tank and there hasn't been anything added to it in months.
Question is... is there anything else it could be? if not, how the heck could it have gotten in there?

Rmckoy · Mar 10, 2021

Looks like some type of nudi

maccyg · Mar 10, 2021

Just an amphipod isn't it?

ChgoGoodGirl · Mar 10, 2021

maccyg said:
Just an amphipod isn't it?

I've had lots of amphipods but none that looked (and acted) like this. It was swimming in the water column against the current. and didn't run when I tried to catch it. Then again, I am not a marine biologist, so it is absolutely possible that it's just some weird one I've never seen before.

ChgoGoodGirl · Mar 10, 2021

Rmckoy said:
Looks like some type of nudi

It does look kind of like a nudi.

jgirardnrg · Mar 10, 2021

Nudibranch of some sort... I have 2 tanks filled with nudibranch in the next room (breeding Berghia nudibranch).

ChgoGoodGirl · Mar 10, 2021

just put it under the microscope and now I fear I'll have nightmare fuel for a month.

driftin · Mar 10, 2021

baby bristleworm? I think the larvae swim.

jgirardnrg · Mar 10, 2021

ChgoGoodGirl said:
just put it under the microscope and now I fear I'll have nightmare fuel for a month.

Nightmare fuel is about right... I've found, especially in this hobby, that some things should never be viewed under a microscope... Ever.

Rmckoy · Mar 10, 2021

jgirardnrg said:
Nudibranch of some sort... I have 2 tanks filled with nudibranch in the next room (breeding Berghia nudibranch).

By chance ...
you aren’t in Canada or breed blue velvet nudi for eating red flatworms ?

jgirardnrg · Mar 10, 2021

Rmckoy said:
By chance ...
you aren’t in Canada or breed blue velvet nudi for eating red flatworms ?

Nope, sorry... I'm in Connecticut and only have Berghia nudibranch.

This place has them ins tock and ships all across Canada:

Blue Velvet Nudibranch – Canada Corals

Blue Velvet Nudibranches are are nocturnal and will spend their waking time cleaning up problematic flatworms. Chelidonura varians

www.canadacorals.com

ChgoGoodGirl · Mar 11, 2021

I wouldn't mind if it's a bristleworm, or even a nudi. but those curly appendages make me think parasite. Luckly I follow the 'when in doubt - take it out' rule.

Rmckoy · Mar 11, 2021

jgirardnrg said:
Nope, sorry... I'm in Connecticut and only have Berghia nudibranch.

This place has them ins tock and ships all across Canada:

Blue Velvet Nudibranch – Canada Corals

Blue Velvet Nudibranches are are nocturnal and will spend their waking time cleaning up problematic flatworms. Chelidonura varians

www.canadacorals.com