Believe it. It´s a TSN.
I´m far from expert in catfish (unlike others that confirmed the ID) but have no doubts.
My lfs has several exactly the same as this one with 2-3".
If you look at the dorsal fin - it is not relevant if it is extended or not - you can see some dots. Sorubim´s don´t have them.
At least in my country the price is a giveaway for any doubts. A small TSN will cost around 9-10 euros (13-14USD) and a small Sorubim (lima or elongatus we only know later) will cost at least 2-2,5x more (strating at 22-25 euros, so around 30-34USD)
I´m far from expert in catfish (unlike others that confirmed the ID) but have no doubts.
My lfs has several exactly the same as this one with 2-3".
If you look at the dorsal fin - it is not relevant if it is extended or not - you can see some dots. Sorubim´s don´t have them.
At least in my country the price is a giveaway for any doubts. A small TSN will cost around 9-10 euros (13-14USD) and a small Sorubim (lima or elongatus we only know later) will cost at least 2-2,5x more (strating at 22-25 euros, so around 30-34USD)