My friend's chijuauauanana is pregnant, and it will last 69 days. Once the puppies come out, they're pretty self sufficient after about 5 weeks.
Humans take 9 months and they're self sufficient after about 8 years.
Mantatees aka Seanieptees 13 months!
Camels 13-14 months
Giraffes 300-460 and can stand when they're born.
Rhinos 450 days
Walrus 15-16 months
Dolphins who are arguably just as intelligent as humans have a gestation period of 10-12 months
Killer whales = 15-18 months...
Elephants come out pretty much sufficient and they're pregnant for a year and half!
Elephants can recognize themselves in a mirror. And they have the biggest brain of any land mammal.
Frilled shark = 3.5 years of pregnancy.
Its wilderness!