Do puffyfishes has fur?

I got a Betta Fish yesterday, but he or she stays to one side of the tank. Is it something I should be worried about? Because the Betta just stays in one spot, sometimes not moving...

We have a 30 gallon tank. That tank includes 2 loaches, 2 guppies, 2 mollies, 4 ghost shrimp, and a snail. We were told the snail would eat algae, which was the only reason we got ...