If he was still moist when you found him, then yes, because Bettas can survive out of water much easier then other fish (because of their labyrinth organ) and as long as they're still wet, they have a pretty good change of recovering.
Immediately use aquarium salt (1/2 teaspoon per gallon) to prevent infections and raise the temperature to about 84 F to help his immune system. Keep a careful eye on him, and if he seems to develop any signs of other diseases (i.e. fungus) treat him with the appropriate medication. It may take a while for him to fully recover though.
Just a side note: a proper betta tank or bowl should have a breathable lid as bettas are known to be jumpers. Also, make sure your betta is not trying to jump his tank/bowl for a reason (like dirty water, cold water).
--------------------------------
It is not very likely but it still could have a chance of living. I sugest u get a lid for your tank and keep a close eye on him/her. It also depends on how bad it is hurt weather it is scratches deep cuts or just some scales missing. If you know it is not going to live I sugest putting it down in a humane manner of putting club soda in a bowl with a lid (this will anestesies the fish so it will not feel any pain), next I would put the fish in the bowl put the lid on and put it in the freezer over night and get rid of it as soon as possible in the morning. I still have a weather laoch in my freezer because it got attacked by a crawdad and it had no fins and was bleeding it was one of my first fish and it meant alot to me and I had a hard time putting it down, but as long as I am alive i will have it in a freezer were ever i live.
Please do not put your fish in club soda, then in the freezer! That can't be a pleasant way to go for anyone. My male Betta Bruce jumped out of his 3 gallon tank and I found him on the carpet. I thought he was dead when I first saw him, he was starting to dry out, his fins were starting to clamp together and he had carpet fuzz on him (poor guy). He was carefully picked up, then started moving. He was put back into his tank and I added some "slime coat" to his water to help protect his scales, help him heal and aid with his stress. That was about a year ago and he is still alive today. It took a few days for the carpet fuzz to fall off (just let it natrually fall off) and his fins are still stightly clamped, but he's just fine. Aquarium salt could also helpful with preventing infection (as the person above mentioned 1/2 teaspoon per gallon).
some people have more success with epsome salt. See bettafish.com for more information, or put a post in the betta fish emergencies forum for a prompt reply from betta fish experts.
answer 2 by LipRings:mine female betta did she layed there for prob 2-3 hours i didnt do anything fr her shes fine now
pretty badly i would have imagined
Pretty badly.
Pretty darn badly
Yes. pretty badly too
yes the Arctic fox is dangerous it will probably bite you and scratch you pretty badly
Pretty badly, he's dead
could be but it could end pretty badly
Well some cant and some can it depends on the child but ifthey do light it they will get burned pretty badly.
Hurt you, hurt you badly.
usually; you always want what you can't have
i read that beta males are very territorial. it might just be that the fish is not self aware and believes he is seeing a male that is threatneing. so for him he's just trying to get the other fish scared or to prepare to fight even though there is no other fish.
== == you can't put to malebettas in the same tank together because they are Territorial fish and they will fight until one badly injured or dead. But you may be able to buy a divider for your to keep to bettas.