Maybe he thought he was a kangaroo?
Bettas jump all the time and they will do it even when well looked after and comfortable in their tanks. Some can even be trained to jump for pellets on cue, they are so good at it. You should always cover their tanks. Sitting a piece of paper over the tank is often enough to discourage jumping.
Fish tanks were not 'discovered' they were invented.
yes it is
fish tanks
The Roman empire had a very large industry making fish tanks, before that, the Chinese had been raising fish in holding tanks for about a thousand years. Before that, people were probably building fish tanks since before we understood how to make fire.
fish tanks
it is the same as fish tanks
One can buy used fish tanks on AquaBid. On there, you can buy or sell used fish aquariums. Many tanks on there are cheap and afforadable, but make sure you clean it.
Yes - fish jump all the time.
To list all the fish that jump would need an encyclopedia. Most fish jump. There are very few fish species that don't or won't jump when they are being chased and are under threat.
no
50 cm