Yea, I also think TS should start his thread in "Serious Kopitiam". But it already started. Can't change, right?
I rarely eat carp because they usually have a lot of bones which I am not patient enough to go thru all the effort. Even those expensive carp like Empurau, Jelawat & Temoleh, I ate it cause people (bos or rich client) belanja. As such, I don't really familiar with carp (there are a lot of Empurau, Jelawat & Temoleh informations in English that you can find on the net). As for normal carp, I can't find much. Maybe there is more in Chinese website (which I can't read).
I could only find some info in English as below:
Grass (草鱼), silver (鲢鱼), bighead (鳙鱼), and black carp (青鱼) are known as the "Four Major Domesticated Fish" (四大家鱼) in China and are the most important freshwater fish species for food and traditional Chinese medicine.
* mean the Chinese have breed them as food for thousand of years, same like chicken, pig or cow.
When the Chinese migrate in mass to South East Asia (I believe they call it as "Nanyang"), they bring carp with them. When the Malay in those days ask the Chinese about the name of those carp, the Chinese told them those carp are from Tongsan (China). So, it is Tongsan Fish/Ikan Tongsan (derived from Cantonese) - “唐山” (Mandarin).
Those Tongsan fish are known to be a tough fish in terms of endurance (able to survive) to different environments & physically as game fish. However, they are known to fail to reproduce especially in captivity due to their strict requirements for reproduction that includes water temperature or substrate type (especially true in tropical climate as they are originate from temperate climate region, China). You rarely see people
BREED Tongsan fish in Malaysia. Most Tongsan fish eaten in Malaysia are young fish that are imported from China & kept till it is mature enough to be served as food or some kept it in fish pond for angler to fish.
Only the common carp (Ikan Lee Koh) which is not part of the "Four Major Domesticated Fish" has been found to breed locally (Malaysia, Singapore, Taiwan, India) under natural conditions. While the "Four Major Domesticated Fish" are able to breed perfectly fine in climate that is similar to East Asia. For example, in your video, at USA, specifically northern USA heading towards Canada.
Recently, those "Four Major Domesticated Fish" were successfully induced to spawn in captivity by injecting the ripe fish with a pituitary
(search for pituitary gland & anterior pituitary) suspension made from the pituitaries of gravid common carp. I heard there is one (research/experiment using this technique) at Bukit Tinggi (not sure is Klang one or the one at Bentong, Pahang).
While it is cheap, demand for Tongsan fish from consumers is "almost non-existent", and it is usually hawker stalls and restaurants that buy this type of fish. In Malaysia, I only heard of two Tongsan fish that was normally served in Chinese restaurant as there is this popular saying in Cantonese, "Soong yu tau, waan yu mei" which mean if you want to eat fish head, then eat Soong Yu (Big Head Carp), if you want to eat the fish tail, then eat Wan Yu (Grass Carp). As such, I only have details about this 2 fish.
P.S I wonder what happen to the Soong Yu Tail and the Wan Yu Head if everyone eat like this? The Malays differentiate this two carp by their scale. Grass carp have thicker scale hence the Malay name of tongsan sisik kasar while
bighead carp have thinner scale hence the name tongsan sisik halus.
Grass CarpMandarin name : 草鱼 (cǎo yú), 鲩 (Huàn), 鲩鱼 (Huàn yú), 油鲩 (yóu huàn)
Cantonese name : 皖鱼 (Waan Yu, Wan Yue) * It is said that due to Cantonese having 9 tones? They pronounce "Huan" as "Waan"
Hokkien name : Chow Hu
Malay name : Ikan Tongsan Sisik Kasar, Kap Rumput
Details:
• When the preferred food of the grass carp is not available, this fish feeds on terrestrial (land) vegetation hanging over the surface of the water. In fact, the name "grass carp" comes from its unique ability to consume terrestrial grasses. Other terrestrial plants eaten by grass carp include banana leaves.
• It have elongated, chubby, torpedo-shaped body forms.
• Its terminal mouth is slightly oblique with non-fleshy, firm lips, and no barbels.
• Its body colour is dark olive, shading to brownish-yellow on the sides, with a white belly and large, slightly outlined scales.
[attachmentid=9536071]
Bighead CarpMandarin name : 大头鱼 (Dà tóu yú), 鰫鱼 (Yóng yú), 松鱼 (Sōng yú)
Cantonese name : Soong Yu
Hokkien name : Twa Hu, Hua Leng
Malay name : Ikan Tongsan Sisik Halus, Kap Kepala Besar
Details:
• It has a large, scaleless head, a large mouth, and eyes located very low on the head.
• Adults usually have a mottled silver-gray coloration.
• This fish are primarily filter feeders, preferentially consume zooplankton, but also phytoplankton and detritus.
[attachmentid=9536072]
Some people identify Soong Yu (Bighead carp) as Silver Carp due to their similar look.
* For those who found the information above are not correct, pls comment

Thanks for the info. I have a lot of Soong Yu (the Chinese restaurant wrote it as Soong Fish) before with my elders but I didn't realize those are carp & not native to Malaysia. It really have a lot of bones.