Why is a sea lion a mammal?

Sea lion, any of six species of eared seals found primarily in Pacific waters. Sea lions are characterized by a coat of short coarse hair that lacks a distinct undercoat. Except for the California sea lion (Zalophus californianus), males have lion-like manes and constantly roar to defend their harems (hence their name). read more

The female will give birth to live pups who will suckle milk from the mothers mammary gland. read more

All sea lion species are carnivores with large canine teeth, or"fangs", and a muzzle full of stiff whiskers, and may also make loud roaring noises which are all lionesque features, but the most shockingly lion-like species is the incredible South American sea lion. read more

The California sea lion is mostly a coastal animal that frequently leaps from the water when swimming. A fast swimmer and excellent diver, it forages underwater for an average of three minutes at a time, but dives can last up to nine minutes. read more

A male California sea lion weighs on average about 300 kg (660 lb) and is about 8 ft (2.4 m) long, while the female sea lion weighs 100 kg (220 lb) and is 6 ft (1.8 m) long. The largest sea lion is Steller's sea lion, which can weigh 1,000 kg (2,200 lb) and grow to a length of 10 ft (3.0 m). read more