yes, it's because of they're large fins
No, betta fish are best as solitary fish, and unless they are going to mate, they do not swim together
For the same reason you walk. To move or go to some other place. They gotta get around some how.
Feed Betta little peice of a boiled Pea.
it dies or it will only swim in circles
Betta fish may lay on their side due to stress, illness, or poor water quality. It could also be a sign of swim bladder disorder, which affects their ability to swim properly.
What's the general environment? If you don't have some source of oxygen the betta fish will try to conserve oxygen and not move around. I suggest putting in elodea.
All the sources I've read say slow, but I've seen some that swim quite fast... it might depend on the fish, but generally slow.
Most fish swim away, or hide. Betta, on the other hand, LOVE to fight.
Fish do not normally "float around" they swim. If your fish is floating/sinking then it is probably dead.
Bettas are slow retiring fish. They do not move around much normally. Silvery coloured "pectoral fins" are quite common.
No, it is not safe to keep a betta fish in a cup overnight. Betta fish need a proper tank with clean water, filtration, and adequate space to swim and thrive. Keeping them in a cup can lead to stress, poor water quality, and health issues for the fish. It is important to provide a suitable environment for your betta fish to ensure their well-being.
A betta fish laying on its side at the bottom of the fishbowl could indicate illness or stress. It may be suffering from a swim bladder issue, which affects its buoyancy. Immediate attention from a vet or a specialist in fish care is recommended to diagnose and treat the problem.