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They are a cool water fish, below 70 degrees. I haven't seen them do too well in captivity. And we get them in often and I had one myself that lasted a few months, but for the money, 90 - 120 dollars, you'd want a fish more adept for aquarium life.
If you search on the species name (Opistognathus rosenblatti) you should get some useful information. I don't think the species gets as far north as California - I think just the Gulf of California. Still, relatively cooler temps are probably in order.