Narwhal.
Bowhead whales are known to have the longest life span of any marine mammal, with some individuals reaching over 200 years old. These whales are found in Arctic and sub-Arctic waters and are known for their distinctive bowed lower jaw and thick blubber layer that helps them survive in icy waters.
The Bowhead whale is the longest living mammal.
A Sea Ottier is the "smalliest" Mammal in the sea.
Whales.
snake
A Kangaroo
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 Marine Mammal .
a dolphin or whale
a camel
no, a sea cucumber is an Echinoderm.