Zoo York
I saw yours on hold - saw them the last few times I went to HOT. I wanted to double check, though, that they are in fact Nile Perches. They look awfully a lot like the Korean/Chinese Perch types... maybe you want to get some confirmation before spending the $90 price tag.
I also wanted to caution you, also, that some of them did not look good today (Monday) so you might want to keep an eye on that.