Curious about the most exotic and expensive fish in the world? Let us fill you in. Let's talk about the totoaba fish, which ...

Depending on what color variation you seek and if the fish is also dragon scaled, you could be paying more than you thought ...

Koi are actually a type of carp, and today they're some of the most expensive pet fish in the world. But why ... really high to thousands, ten thousands of dollars. Narrator: That's Yvo de ...

As far as fish go, the Asian arowana is one of the most expensive aquarium species sold ... Narrator: That's Emily Voigt, who explores this world for her book, "The Dragon Behind the Glass." ...

Koi are actually a type of carp, and today they're some of the most expensive pet fish in the world. But why ... really high to thousands, ten thousands of dollars. Narrator: That's Yvo de ...

There's only one type of tuna in the world that grows that ... Narrator: This is the most expensive. And depending on where it's from, and where the fish was raised, the price can vary anywhere ...