These are Cooler water species, this is why you do not see them to often.
They need a tank with cooler temps, one of the problems with keeping this lion is by the time you get it home, it has already been kept in warmer temps, first the supplier than the LFS than you.
A few years ago you would see them in the hobby, a few were trying them, they even set up a species only tank with cooler temps and still they did not survive. I know there is info on this lion out there, I will see if I can dig it up for you.
Kaye