Hello,Tudo...........
It is easy to check if it is a orientalis or a gachua/limbatus..............
orientalis has NO pelvic fins!
Well if it is a orientalis, you need a tank about 100cm x 40x 40cm (160 Litres) to keep a couple.
The maximum size is about 15 to 18cm...........
orientalis is adwarf snakehead.
Interesting:
They prefer insects more than fish!
The content of a stomch shows that they eat more than 84% of water insects and terrestric insects!
orientalis need softer water with a low ph range to feel well!
You can keep them in other water ,too,but I believe,that they will not start breeding in there.
Ch.orientalis is not as agressive as other species of snakeheads an is a good start for beginners!
They are mouthbreeders and feed eggs to their babies...........
Hope this helps!
Regards
Pascal