It is a Pangasius Sanitwongsei. I can not guess how much liters are in this pond (i read something about 4000) but i am prety shure that i won't be enough für this fish. The other fish are all no problem, but the sanitwongsei is able to reach about 2 meters, some of them may surpass even that line! And it is a very fast an active fish too! I think there are very few people who are able to keep this specimen livetime long, a tank of more than 100.000 liter would be necessary.
Greetings