Their stomach is in that little space between the bottom of its gills and the beginning of the long fin on its belly. It's very tiny compared to how long the fish's whole body is, so be careful not to feed it too much; they will eat themselves sick.
There are no fighting fish that come from Japan. I think you are asking about the Siamese fighting fish (Betta splendens). They do naturally have a round stomach almost like a ball. That is their body shape.
It is an adaptation that they have developed to defeat other siamese fighting fish for mates and/or territory.
deffo salt watercoz i have a tank full of siamese fighting fish and i keep them in saltwater
Myron Gordon has written: 'Siamese fighting fish' -- subject(s): Siamese fighting fish
They can't because , Siamese fighting fish are very territorial & will fight . Obviously they're named fighting fish for a reason (: . Your welcome ...
a Betta
Yes.
lazy fighters
They hide.
Yes. The Betta splendens (scientific name) known also by its common names Siamese Fighting-Fish and the Siamese Fighter.
A Siamese fighting fish is a type of betta. A siamang is a gibbon, a type of ape.
Exactly as you spelled it in your question; a Betta fish is also known as a Siamese Fighting Fish.it is spelled "Betta", or its other name, "Siamese Fighting Fish." I know alot about Betta's. :D