A Russian photographer captured some stunning moments of sea lions with vivid facial expressions on Monday. Who knew that sea lions could be so expressive?

Also known as the northern sea lion, Stellar's sea lion is the largest of all sea lions. These marine mammals measure more than 2.5 meters in length and weigh over 300 kilograms. 

It is a near-threatened species of sea lions, listed as Russia's endangered species.

(If you want to contribute and have specific expertise, please contact us at nature@cgtn.com.)