Peruvian Blue Shark Catfish
I purchased a 4 inch Blue Shark Catfish about a month or so ago, from a LFS store called Aquaworld Pittsburgh... cost $40. They had about 12 of them for sale. Let me know if you want a phone number... they may MAIL ORDER.
I think there needs to be alittle more information, regarding keeping them in a home tank... I heard they are aggressive and was looking for a relatively small, mean cat for a solitary tank... this fish from MY experience is not everything that is listed at PLANET CATFISH. Mine is VERY active... swims constantly. I actually have 2 Tetras, 2 smaller platy fry, and a 4" Gourami in a 30gal with him... he has yet to harm anything. Like I had stated... I was hoping for an aggressive fish... he is still a VERY cool fish to watch, very unique... but I think sometimes, when it comes to the UNPOPULAR home aquaria breeds, you can't completely judge the behavior based on the LIMITED info available on the net. I'm still not confident to put him in my main community tank, tho. But time will tell.
Another good example of this situation is the Asian Upside-Down Catfish (Mystus leucophasis)... I bought one after I was misinformed on what it was.
They are stated to be EXTREMELY predatory in home aquariums... Mine is about 7" and a complete baby... in a tank with a Gold Sevrum, 2 Geophagus, 2 Rainbowfish, a Pictus, Brown African Knife, Albino Frog, and a Pleco... the ONLY thing that he will quarrel with is the Pleco, when the Pleco decides to steal his favorite chill spot...
My point is, the Peruvian Blue Shark/Whale Catfish is a VERY COMMON fish in it's homeland.... not endangered or anything... so if you want one and will give your best attempt to care for it, I'd say give it a try, if you can obtain one. And don't trust EVERYTHING you read... all depends on the actual fish, I suppose. Following this is a few pics of mine...
This is my MEAN Asian Upside-Down Cat... a VERY gorgeous cat, in my opinion... obviously joking about the MEAN part! Much lager now, pic is kinda old....