Black Tined Shark?

[minorthreat]

i was at my lfs today an saw a couple black fined sharks it says they only get 6in.? are they the same as sharkcats (silver fined shark) that get 12in +

 

[helterskelter]

is it this fish?
Google images

If so these are not related to the sharkcat, but they still grow much bibber then 6" they easily get to 12" and seen them at 15" long.

 

[minorthreat]

is it this fish?
Google images

If so these are not related to the sharkcat, but they still grow much bibber then 6" they easily get to 12" and seen them at 15" long.

no thats not is. it almost looks like the shark cat but darker

 

[helterskelter]

ok what about this then?

Pangasius cat, google images.