At lower temperatures, they become sluggish and susceptible to ailment. Plants and other decor to deliver cover and a safe lid also is required, especially in small packing containers, to steer clear of your betta from jumping out of its fish tank in quest of a cleanser, or larger body of water. Bettas are carnivores, feeding primarily on bugs and insect larvae in the wild. They thrive on protein based frozen, pellet and flake foods in aquariums. There are a couple of species in the genus Betta, however the best known and most mind-blowing is the Siamese Fighting Fish; Betta splendens; the excellent Betta. This fish comes from Thailand and the old name of Thailand was Siam.