- It does?

What's at the end of the ocean?

A wall?

- A giant crib?

Or maybe a giant rock that's all like, "No more water past this point!"

[all laugh] - Oh, I wish I had time to answer all these questions, but all this talk is keeping me from my big swim!

It's big, big, big!

- Wait, wait, wait!

Where is the end of the ocean?

Oh!

He said it was close, but all I see is water.

[together] Which way is it?

♪ ♪ - Uh, come on, guys.

We can catch up to him.

Come on.

♪ ♪ Uh... uh, Sal?

Hey, Sal.

- Hey, Sal, we had a question for you.

We were-- ah!

Where did he go?

- Coming through!

all: Whoa!

- Oh, and you kids should know, the ocean water ends, but not in the way you were thinking.

- Why?

Ugh.

How does he do that?

What do you mean, Sal?

- I said the ocean ends.

all: Whoa!

- I never said anything about the water ending.

- Okay.

Not only is Sal very fast, he's also very confusing.

- But Sal, if the water ends, the ocean must end too because... well, the ocean's made of water!

- The ocean is made of water.

That much is true.

But the ocean is made of saltwater, which isn't the only kind of water on earth.

- It isn't?

But-but Sal, wait.

We have another question!

- Yeah!

- Yeah, wait up, Sal.

- Oh, kids, I don't have a lot of time.

I got a big, big swim upstream in the river, which is made of another kind of water: freshwater.

- So there's two kinds of water?

- Oh, three, actually.

There's saltwater, like the ocean, freshwater, which has no salt in it, and then there's a mix of the fresh and saltwater called brackish water.

- So the two types of water can mix together!

- Sure, in places just like this, where the water from the river meets the water from the ocean.

- Oh, wow!

This changes my whole world!

Which is mostly made up of water.

- [laughs] - And there's places made of water besides the ocean?

all: Whoa!

- And he's gone.