The mixture of salt and water is just right.

The temperature is feeling really good.

And now we'’’re ready to start adding fish and other creatures.

All right, guys.

Are you ready to populate our underwater world?

Yeah!

Let'’’s do it!

Come on around.

Look what we got here.

Now we have to make sure that the fish are ready to go into our tank.

by acclimating them to the tank water.

So we take some water from the tank and we pour it in to where the fish are.

We have to introduce all these creatures into the same conditions that they'’’re used to so they don'’’t get a shock.

As this tank'’’s water mixes with the water that they'’’re in now, they'’’re gonna be used to the water they'’’re going into and be ready to enter their new world.

CHRIS: One final test of the water.

Have a look.

Oh, yeah!

It'’’s perfect.

MARTIN: All right.

Now it'’’s time for the fish!

CHILDREN: Yes!

Okay, let'’’s get them in there.

There you go.

A Flame angel.

That is one beautiful fish.

Cool.

Now we'’’re gonna be a little extra-careful with the fish and what we'’’re gonna do is put them into bags and then float them in the tank so the temperature inside the bag will turn to the same temperature as the temperature in our tank.

Cool.

MARTIN: Oh, Clownfish!

(Laughing) They look like twins.

Can you tell them apart?

BOY: No.

He'’’s called a Sailfin tang because his fins spread out really wide like a sail.

BOY: Wow that'’’s cool.

MARTIN: Chromis.

Let'’’s get them in there.

They'’’re gonna love their new home, I think.

A Yellow tang.

MARTIN: As soon as the temperature inside the bag is the same as the tank, the fish are ready to be released into their new world.

CHRIS: Here comes the Hippo tang.

BOY #2: Wow, that'’’s a really cool fish!

MARTIN: Here we go.

Swim free.

Beauty.

CHRIS: There they go.

1, 2, 3, 4, 5, 6, 7, 8, 9.

BOY #2: It'’’s so cool how the Chromis stay together and don'’’t leave each other.

MARTIN: Yellow tang heading your way, guys.

CHRIS: All the fish are exploring their new world.

MARTIN: Wow.

How awesome.

All right, way to go.

We created an underwater world.

Yes!

CHRIS: See you on the creature trail.