So I recently started a Caridina Tank. I originally planned on getting Neos but upon realizing that my substrate was for acidic water while my tank was still fish-out cycling I decided I would switch to Caridina, mainly because I liked to novelty and challenge and saw it as fate. My first Order was from Clint Davis at ShrimpAmbition, because I wanted to get quality shrimp and Reddit seemed to suggest him a lot, I decided not to get too many shrimp, since it was my first time owning shrimp, but also wanted a good enough colony size, so got 8 shrimp, 2 Bees, one Wine Red, one Blue, 4 Blue Boas, and 2 Ocean Blues. 

The First Colony:  
The first colony settled in nicely, on their first day they spent most of the time exploring the tank, all the blue shrimp seemed to occupy the same areas, aside from 1 female blue boa, who seemed to be distant but the male boas seemed to like coming around to graze with her occasionally. The singular Red Bee who is a male seemed to spend most of his time away from his friends. I wondered why they separated the red bee seemed to spend most of his time grazing alone on the Javamoss bridge while most of the Blue Blue boa males, and Ocean blues hung around the glass beneath shading, or on grazing on the sponge filter. The first two days they settled in nicely, by the third day I felt like I should try and introduce some food since they had only been feeding on algae and biofilm built up from Plant in cycling. I bought a small bottle of Omnivore Shrimp Food by Aqueon from Petco, mainly because I planned on getting some premium snowflakes ordered by didn’t want them to starve. They recommended 1 wafer for a colony of 6-12 shrimp, in hindsight I probably should have put a little less since they were still adjusting to their new home, most of my shrimp actually seemed to avoid it, aside from my socially awkward female boa who grazed a bit on it then hung around it but didn’t really seem to like it. Most of my other shrimp avoided it. The next morning upon checking on the Tank I noticed that my Female Boa hadn’t really moved much from the spot I had seen her in the night prior. Neither had my Blue bee shrimp, although I noticed they the blue bee seemed to just hang around that spot normally. Unfortunately it was quite obvious that my blue bee passed away, but I did not realize my Boa had also passed until I tried to remove the leftover wafer that my shrimps seemed to avoid and she floated motionless. Unfortunately this was a big hit to my colony since I believed those were my only two females. My 6 remaining shrimp seemed to be in good health but they were all hanging around the filter for the next couple of days way more consistently, including the Red bee, although he strayed away occasionally. 

I’ve been actually watching the individual personalities of my shrimps since getting them, and upon 1 week of them being in good health, I decided to get 6 more shrimp to make up for the losses.   
What I’ve noticed so far is that my Red male bee is the most explorative, my male (2) boas, tend to usually hide in the Firemoss, and I recently discovered that my third Boa is a female due to how much she’s grown, she originally didn’t look much like a Boa and had a deep blue color blue over the days she’s sporting a lighter shade, while my males have actually darkened their whiter areas a bit to a sky blue.   
My original assumption was that my first female boa was distant due to being sick, but my new assumption is that Female Caridinas tend to be more isolated, maybe due to their size making them have less fear of being alone. The males tend to stick together although will join any female or graze around her while generally respecting her space. My male Blue Ocean is generally hidden, although whenever I do see him, he’s either around the juvenile male boas, or sometimes around my female blue Ocean, who is probably the new most isolated shrimp in my tank, although also the one I see the most frequently.

NEW ARRIVALS:   
I know this post is a bit lengthy but I’ve been trying to find research on caridina shrimp behavior and realized it was a lacking area so this second section will be specifically about how my second order of shrimp I received today have been interacting with my previous colony.

My new Colony is 8 new Additions, I actually ordered 6, 3 Blue Boas, 1 Blue Bolt, and 2 Galaxy Boas but it seems Shrimp Ambition added 2 extra Boas for free. (Honestly amazing recommendation and it was a nice surprise since I lost two shrimps which I never even bothered mentioning)   
It’s an even split of 4 males and 4 females.  
They’ve been in the tank for about 4 hours now, upon adding them, the first thing I’ll note is that the males were extremely active when they first got put in, exploring basically every corner of the tank, the females immediately started grazing with the exception of the Galaxy Boa, who was extremely lethargic upon first entry, she is also the largest among all my shrimp so I’m assuming she’s up on age, hopefully the parameters aren’t causing her any issues, my other additions seem to be adapting quite well although they’re quite younger which is expected. She’s pretty isolate which like I mentioned previously seems pretty common in larger females, but the males don’t seem to really approach her much, only my other female boa from the same colony, who grazes around her from time to time. The first male boss who were pretty shy at first have actually been becoming a regular sight, and strangely they actually seem to be running the tank although being pretty small. They’ve been bullying the new arrival males, and the new male bias actually skirmish when they see a Group 1 male approaching the same area. Although I’ve seen them hanging together quite often and only noticing this bullying behavior if the group 1 males want to overtake a grazing colony, or if the New arrival are around Group 1 females. The group 1 males have been around the group 2 females a lot though and the opposite behavior isn’t being shown, but I feel like it has more to do with the Group 1 males having more of a “claim” to the tank since they’re more familiar with the surroundings. Overall they seem to be quite happy with their new friends.

Shrimp Tales: New Arrivals