They come from Australia and are pretty expensive. I used to sell them to clients for 700 bucks wholesale level.
They do not adjust well to captive diets but will eat live foods. Live brine, if soaked in vitamins will be ok. I hate feeding brine but you might be able to teach it to eat something else while you feed the brine.
It is a box fish. I believe like the rest, it may emit a toxin. If you have a large tank, no worries. If you have a small one, keep a lot of carbon on hand, and enough water for a water change.
Good Luck. They have a very very bad survival rate in captivity.