Why do hippos have secretions to protect their skin and crocs don't?
They both share similar environments and protecting their skin is a requirement for both species. They're both amphibious... I can't rationalize it. Please help.
- Anonymous8 years agoFavorite Answer
Hippos are mammals and they're skin is not covered over by scales like the crocs(reptiles). So in order to protect their skin cells they have other adaptations like the one you mentioned. The secretions are actually modified sweat which are more acidic than ours. The acidity is to kill bacterial growth on their skins and also acts as a sun screen.
for more info http://www.phschool.com/science/science_news/artic...