He is in Singapore so it should be fine, They get to around 28" or 65-70 cm, and tolerate temps from around 70-86 F. Very tolerant of low O2 and live in fresh to brackish water. Except when feeding they are not very active but they will eat almost anything at anytime, I had one that at 10" ate an 8" largemouth bass within 10 minutes of being put in the tank. it ate hot dogs, cat food, and anything else that went in the tank. It would even try to eat my hand. In Singapore I think they are sold for market as the Soon Hock. I like the ornery guys but would not keep them with anything that was not bigger than they were.
Found the name as a cross reference,
it has lots of names including;
Trey Damrei, Cambodia
Bakutut and Ikan Betutu, Indonesia
Kawaanago, Japan
Pa Bou, Laos
Ketutu and Belatok, Malaysia
Bia, Philippines
Pla Bu Sai, Thailand
and Ca Bong Tuong, Viet Nam.