Orangutangs, maybe. They nurse for an average of seven years before weaning.
The Bowhead whale is the longest living mammal.
Narwhal.
The sea turtle has the longest known life span of all known sea animals. The dolphin is the longest living mammal.
snake
A Kangaroo
Whales.
A giraffe is the tallest mammal alive, it also has the longest neck!
A giraffe is the tallest mammal alive, it also has the longest neck!
a dolphin or whale
a camel
I'm not certain, but I'm pretty sure the Fin Whale, Balaenoptera Physalus, is the second longest mammal at about 88 feet long.
African elephants have the longest gestation periods, at around 22 months.