they def look like pangasius sanitwongsei. its likely that there is just some physical diversity which is common in all species. they look great, and the pond is awesome. please post as many pictures as you stand to upload
here you go. 23,000 gallons, 5 1/2 feet deep. 3 bottom drain to 3 chamber system (vortex, brush, biological with j mat) two 40 watt aqua uv. performance pro pump. bought all the fish feb 1, 2006.
My biggest problem with taking picture is the morning glare, even with a uv filter. high noon seems like a better time to take pics, so I have to wait for the weekend to do that since I have to go to work. Another obstacle is how the hifin color blends with the dark bottom.
IITUFFTOBEAT: yeah, I guess not all of them can be a yao ming, especially when the biggest is very territorial during feeding time. Thats him in the last pic. His pectoral fin and spike has recovered since that pic and I notice his dorsal antenna is growing back slowly.