Which animal can often only be seen with its nostrils out of the water?

It is a water animal that's why

Rinos are #1 for killing people where they live!

They can't survive long out of the water. Years ago in Southern California a hippo named Bubbles escaped from a African themed park into the open hills of Irvine for several days , but died after being shot by a tranquilizer gun and suffocate d by its own weight while lying unconscious on the ground

Ken, it says it's the second heaviest land mammal, yes elephant is #1, Rhinoceros is probably #3,and from what I've seen, that would be correct

I think the elephant and black rhino weigh more than hippos.

I believe that they are the third largest ! Elephants and