青いベタ /a oi be ta/ would mean 'blue betta/fighting fish' in Japanese.
To say blue fish in Japanese you say ブルーフィッシュ.
Japanese fighting fish are called 'des combattants' or 'des poissons combattants' in French.
Blue wolf is ao ookami in Japanese.
The Latin name (scientific binomial) of the fighting fish is Betta splendens.
formless doesn't make sense when added to fighting in Japanese so free style fighting is sutairu ga jiu no tadakai
You may say 'sakanaya,' written in Japanese as: 魚屋
Akai sakana is red fish.
Shironagasukujira
"Aoi"
青 (ao)
oabara
In Japanese Fish = Sakana. (That is all I know)