I have a Green Brittle Star. They do eat meat.......and although I have kept mine well fed he still ate one of my Peppermint shrimp. I would not have believed it but I actually saw hime snatch the shrimp and pounce on it. Brittle stars are extremely fast when they eat. They can scoot around pretty quickly.
Mine (if measured from leg to leg) would be almost 10 inches. I have rescued fish from him before, he would be chasing them down...LOL
. Most of the time the other tank mates get away because they are faster, but slow moving fish are and will be prone to being dinner for this guy when he attains a measurable size.
Not trying to scare you away from having one because they are beautiful specimens, but just trying to inform you on the other aspects of keeping these guys. Now this is just my expeirence and may not be the same for others.
125 Gal-35 Gal Wet/Dry-Tetra-Tec PF500 HOB
(3) AuquaClear 301 Powerheads-600 GPH
Automatic Tempature Controller
5-6 Inch Sand Bed-200+ lbs of LR