the lion is actually a Volitan, and no, tanks need be much deeper, front to back than 16 inches. if you were to obtain a baby over a mature specimen, it will be possible, but only for a short period of time. Gallon wise, you might be okay. For that type of a tank, roughly 60 gallons, a couple Dwarf Lionfish, like fuzzy dwarfs, etc would work out fine, due to the dimensions of there fins. Watch your coral to be sure, and shrimp and other inverts should be avoided as they will become food. Ensure proper water quality and lighting for the coral are met as well, before purchase of corals.