I just lost mine a week or so ago,but they are a very cool star...Mine was fine till one day it started loosing it's horns/spines.They started falling out slowly at first,one or two a day.They left huge gaping holes in his flesh when the fell out,but these holes seemed to head over in a day or so.So seeing as how it seemed to be healing itself quickly,I thought he was going to be OK. Then one day I got home from work and there were big chunks missing out of his arms,and five or six of his horns had fallen out at once.I took this as a bad sign,so I put him out of his obvious misery..I WILL get another one someday...This guy was in my tank for well over a year...