Females are non-agressive and will most often leave the snail alone. If you have a male, he most likely will. It also depends on the size of the snail, the larger the snail the less likely it will be harmed, but a larger snail in turn can injury a betta if it snaps shut on the bettas head. For the most part snails and bettas don't mix well.
As long as they are larger than your thumbnail they will be fine, but do not expect them to be able to reproduce. The betta will eat the babies.
Edit 10/3/2013 10:58am EST
This is false. I have a betta fish. He was in a fish bowl. Here's why it's false that bettas don't eat the babies. In a matter of weeks the snails reproduced. Freddy never ate the baby snails. I know this because they were everywhere weeks after reproduction. So, YES, snails can be in the same tank as betta fish, and they don't need to be bigger than your thumbnail. It would be recommended if your betta is a little bit more vicious than the average male but otherwise it isn't required.
Snails, contrary to popular belief, need to be fed algae wafers and veggies to be healthy, they can't feed on waste in the tank alone, so they will be adding more waste to the tank rather than cleaning it. Not even a Betta would be healthy in a bowl, as they need filters and heaters to healthy and bowls have unstable water quality, so adding more creatures to the bioload is a bad idea and can cause ammonia poisoning.
Yes, snails make fine tankmates for Betta's.
No, you should not put a wild snail in a Betta fish tank. The snail could give the Betta disease and cause the Betta to die.
some might
Yes. The Betta splendens (scientific name) known also by its common names Siamese Fighting-Fish and the Siamese Fighter.
No, because they are fighting fish and one of them will kill the other.
Betta fish can refer to any member of the genus Betta, which has numerous species, all native to swamps of Southeast Asia. The Siamese fighting fish is only one specific species, B. splendens.
No; clownfish are marine (saltwater) whereas fighting fish/betta's are freshwater fish. They cannot be placed into the same type of water or aquarium.
The male Betta will only fight another male Betta. They are slow, timid and peacefull fish except when another fish of the same sex and species is in the same vicinity.
Angelfish will likely pick and nip at fighting fish if put in the same aquarium.
yes, goldfish and betta fish fight.One time I had 2 goldfish and one bit the other one and it killed it.Never have 2 betta fish in the same aquarium or bowl because they will fight right when they get in the aquarium/bowl!
The male Siamese fighting fish (or Betta splendens) will only fight with another male of the same species. Under normal circumstances they are a quiet, slow moving and peacefull fish. It is only when another male of the same species is introduced to its tank that the Betta becomes territorial and aggressive.
No they can not. Some people call a Betta splendens a Betta or a Siamese fighter or a Japanese Fighting Fish. They are all refering to the same species of fish. They come in both males and females and both are needed to produce any young.
I have a male red Beta and a snail in the same bowl. I've never seen even him try to get at the snail.
No. Betta fish will attack each other no matter the sex.
keeping multiple bettas in the same tank is not reccomended