i think it's kelah.This particular species of the carp family do indeed fetch a high price in market reasoned by it's taste and sport fishing.
but the main problem promoting it as an aquaculture is that it grows 1 inch or less annually
that mean's you got to wait for a long time to harvest fish weighing kgs.except you intend to catch it wild.
it does look good and sell good,but how many consumer readily eat this fish regularly.would you?nah too expensive
i think is like with ikan ketutu but this fish grow in size readily.
but it's expensive and is serve as one of the delicacy among chinese people.
again,chinese people don't consume this fish daily,well only occasionally
.general chinese population prefer saltwater fish over freshwater fish , as it doesn't smell bad.
that's all then.hope this help.

Even if you want to do venture into this business, i think you need to have sustainable flow of Kelah fish.Which I seriously doubt so as it's easier to catch them in the wild than to rear them up to the size you want.
for that, i will have you understand that their number is dwindling down fast.What with people masak ikan bakar right after fishing them.
The days for this fish are numbered given that they took such a long time to grow to the size to feed few adults.think of Koi fish if you like as both of them are carps.koi fish have a poor growth rate.

think that's in perak ler

i know they really like biji kelapa sawit

people have been suggesting ikan ketutu can be rear, look where it goes...no news
i know a Fish shop owner that keep an ikan ketutu, according to him that that fish have been with him for 2 years and yet to attain 1 kg weight despite feeding it with delicious fishes.lol

Bro, what's the growth rate for that fish?