Hippopotamus

A hippopotamus wallows at the always-excellent Saint Louis Zoo.  Schools of fish perform an ongoing underwater cleaning by pecking away whatever they can from every submerged surface.

Their range used to extend over much of Africa up to the Nile delta.  Following the downfall of the drug lord Pablo Escobar, a few imported hippopotamuses were left roaming his estate in rural Colombia.  They've since multiplied to become a small herd, and happily call the Colombian jungle their home.