The new betta is a pearl Super Delta. The tips of his fins are actually pearlescent green, which I believe will be stunning as he goes. He is just a baby now. The Super Deltas can grow to be 2-3 inches in length, which makes them larger than many other betta varieties.
Bettas require little care and are quite hardy and robust. They're the perfect fish for the novice, which is why I got my grandchildren started in fishkeeping with bettas of their own.