Yes. They are tropical fish. In cold temperatures they become lethargic and can't digest their food properly.
Bettas should be kept in stable filtered, heated tanks, heated to a constant temp around 78-80F.
No
Betta fish may be dying due to poor water quality, improper tank conditions, or diseases. To prevent this, ensure the tank is clean, properly sized, and has a heater and filter. Regular water changes and monitoring for signs of illness can help keep your betta fish healthy.
Likely yes. Most sucker fish need a filter and heater though, and most betta's are housed without these things.
other Betta fish and the bigger fish.
Betta fish do not eat fish.
No betta fish are carnivores.
Well, if you love your Betta fish, then it should live by itself. But if you add another Betta to your current Betta fish's tank, then they will start a fight because Betta Fish are Siamese fighting fish and if one Betta is in contact of another Betta, the possible reason would be a fight between them two.
A betta is a fish of the species Betta, especially Betta splendens, commonly known as the Siamese fighting fish.
yes
Sure we have betta fish in cuba
betta fish are specifically bred for fighting
No. Betta fish will attack each other no matter the sex.