Weighing in at about 900 to 1300 pounds, and measuring at about 8 to 11 feet, the Weddell seals are among the largest species of seals. They are absolutely adorable too, I mean, look at the little guy. These seals like to forage for their food, diving deep under the water to feed on, and eat whatever fish they can find. These guys are not endangered, they are one of the most common species of seal in the Antarctic now.