Fresh water shark???

I would like to see what I can find out about a fresh water shark. I tried looking online but with no luck. The reason I ask is because a coluege of mine knows I'm into aquariums, and asked if I knew anyone who knew about them. He used to have a 55 fresh water, but now he wants to inquire about a shark that is around 12-18" Anyone know of anything??? He is willing to buy equipment from any of us who may have it available too

There are so many fish referred to as sharks but aren't, bull shark is the only shark I know of that will go fresh and those definitely aren't for a tank!
get a description of it, silver with black edging to the fins perhaps?

Ya thats what I thought. I know about the various loaches and cats that get called "sharks" . How about something 12-18" that is salt? If thats all there is maybe i can talk him into it. I am a salesman

There are some cool catfish that look like sharks but nothing beats an actual shark.

Pros and cons of each:
Freshwater Pro's:
They can handle almost any water conditions cause they are catfish.
They are very easy to feed and care for.
You can train some species to feed from your hand.
Here is the one I have in my display tank cost $100 and looks like a whale shark. ageneiosus marmoratus

Freshwater Con's
They don't do much swimming, they are catfish and catfish are lazy.
A lot of cafish are nocturnal so you won't get to see them much.
Most become more aggressive as they get bigger.


Saltwater Pro's
They are real sharks.
They will swim all or most of the time
You can train them to feed from a stick.

Saltwater Con's
Salt requires more attention.
You need a round tank or they will bump thier nose and eventually die.
Most grow way too big and you will have to donate them to an aquarium or something.

I'd tell the dude to go for a catfish species.

I was just thinking today how much I missed my 4 line pimodella catfish : ( Ah well, he went to a good home in a tank literally 10x bigger than the one he was in with me :/

And of course there is always the balas, red-tails, and hi-fins, which are all cyprinids. But the bala is really the only one that actually looks kinda shark-y. And they do best in schools, so that might be a problem for some folks.

Hm well, thanks guys. I figured thats what my answer was going to have to be. But hey ive asked simpler questions and got waaayy longer answers. I might try a thread or two about those. They were pretylty good debate topics on another forum. However yall practice most of the same things anyways but hey.

The best shark for salt is the bamboo shark, doesn't grow massive. But its kinda nocturnal and lacks the 'teeth' of a shark. But boy do they pounce ghost shrimp any time of day! will do just fine in a standard tank over 150g, the more floor space the better. Does not need to be round.
now if you want a 'shark' that's 1,000g and up.........

Ha ya right, as awesome as that would be! But I'll throw both of those out to him as options, see if one of those might work for him.

The freshwater sharks are sharks able to live in freshwater lakes and rivers are mostly:
the bull shark,
the river sharks and
the Mully Catfish.