Good point. Does the fact that Dats aren't known to breed in captivity, their sex can't be determined, how expensive they are, the many species, just too many secrets about them make me think somehow the original Siamese Tiger is being cross breed and and many species sold to hobbist who are fascinated with their boldness and unfish like personalities. I saw for the first time just recently a Marble Datnoid, wow, looked like a Dat with dark grey body and light grey striped length wise his body, like a tiger shovel nose catfish. hummThe difference from back then to now is the fact ST’s aka pulchers are now identified instead of just being mixed in with Indo’s like they use to be/almost extinct in the wild cause how desirable they became for always staying bright gold. Your Sumatra dats are Indonesian tigers. Sumatra is just the area they come from. They may also call these fish 3bars, 4bars, forkbars, vbars, or just oddball indos .... all the same fish but all with different price tags lol. All still get into the mid 20inch range. These are also hit or miss if they will be stable or unstable which refers to them being black or showing their nice bold black bars on a gold body. Then you have the short body version’s of these fish which I personally just Can’t stand. Then you have some called rhino indos or unique cause they have like a horn growing out of their head or chunks/fins missing from the body. Short body’s and this unique ones are the tampered ones. LoL a lot has changed since the 70’s to now. Welcome back to the datnoid world hope this helps you.