What's my bamboo shrimp doing???

[Kate14]

Evening all!!
I have 3 bamboo shrimp that are about 1.5 years old ish. I noticed the largest one doing this today and no idea if it's something they all do or a new thing??!!
It's abdomen looks like a fan and doing some kind of rippling movement??
Any info would be great for my curiosity!!
Tia

 

[MattW]

To me I see the shrimp doing 3 things

1. Eating
2. Fanning eggs
3. ing

I'm pretty sure bamboo shrimp, similar to Amanos require brackish water for the young to survive.

 

[Beastije]

Yeah, it is berried with eggs and is fanning them, that is normal. They do not survive in a freshwater community tank