I have/had 3 mandarins. The first one (spotted) ate mysis and pellets and I owned him for about 2 years, I got him from another canreef member who had him for a year which he said he got off of someone else who owned him for awhile. The second one (spotted) I got is still alive and I've had her for 3 months. I bought another one (green/regular) for my other tank and she died after two weeks.

current on I've only had in my possession for a month don't know how long they had her prior to me buying the tank

My first dragonette lived for around 4 years. I bought a mate which I believe was too aggressive and eventually she died from stress.

Mandarin
 

We put in a refugium just to support pods for our Mandarin - 8 months now real fat.

Alive. Last year it was in a 20g dedicated mandarin tank.

Recently shut that tank down and moved her into my 70 display.

Ours is @ 2 1/2, was pretty skinty when we rescued her from the now closed(thank God) LFS, plump and happy, eats mysis, hangs out with our red skooter blenny a lot, hunting pods I guess.

Lost him a couple years ago, I estimate he was in my tank for about 8 years.

I just picked up "Mojo" my male Psychedelic Mandarin. He is chubby right now, so here is to hoping he stays that way.

currently still have my mandarin of 3 years ( crossing fingers now )

Currently have 2 in my 30 Gal for 9 months. Nice and fat off frozen (fortified). Soon to be moving into my new 60 Gal.