Point Defiance Zoo & Aquarium's endangered Sumatran Tiger Cub that you may have first read about on ZooBorns is growing by leaps and bounds! Born on August 22, he's now over 10 pounds (4.53 kg) at five weeks old.

The Sumatran Tiger is native to the Indonesian island of Sumatra where only an estimated 300 remain in the wild. This little guy can be seen daily on exhibit exploring and playing daily in the zoo’s Cub Den. If you want to help name him, there's only one week left in which to vote, so make sure to pick one of the six names on the list today at www.surveymonkey.com/s/cubname.

Photo Credit: Point Defiance Zoo & Aquarium

See the first video of the cub, taken when he was just three weeks old!

More pictures after the jump: