An blue whale’s heart is the size of a small car.

Likes

THANK YOU

Your comment will be checked and approved shortly.

Check out our splashing facts about these fab reptiles!

We get the lowdown on these magnificent marine mammals…

How much do you know about these beautiful sea creatures?

Discover the secrets of this fab fish…

You’re leaving natgeokids.com
to visit another website!

Ask a parent or guardian to check it out first and remember to stay safe online.

You're leaving our kids' pages to visit a page for grown-ups!

Be sure to check if your parent or guardian is okay with this first.