[Oberon]

They don't reproduce all that fast, so their presence in the ecosystem is a problem that can still be fixed with use of a hunting season or two.

One hippo would feed a village for a while, I bet...

[chrisinoc]

Problem is locating the hippos.

I took a trip to the Amazon back in 2006 and went by Escobar’s old home. The smaller tributaries are not easily accessible and that is likely where they went to.

[GeronL]

read #6. South America is heaven compared to Africa for a hippo, they start reproducing much younger.

[PUGACHEV]

I think I read once that more people were killed by Hippos in Africa than by any other animal. Whether that’s true or not, I am sure that mosquitoes and files kill several orders of magnitude more.