SEE IT: Volunteers dive into Puget Sound in search of giant octopuses

SEATTLE -- More giant octopuses are calling the Puget Sound home. The Seattle Aquarium counted 28 this year -- up from 17 last year.

The aquarium enlists volunteers each year to check on the health of the giant octopus population in Puget Sound.

It is the biggest octopus in the world weighing as much as 150 pounds with tentacles that can span up to 20 feet.