Hippos must submerge regularly because their skin is thin and virtually hairless and therefore vulnerable to overheating and dehydration.
On our last full day of the trip we drove to the Mara River to see the abundant hippos there.
The site of Hippos, one of the cities of Decapolis, is fixed by Clermont-Ganneau at Khurbet Susieh.
We played a series of games including hungry hippos, mini football matches and learning different types of training skills.
I can watch hippos for ages, playing their sinister, slow-motion, peek-a-boo game of silently submerging and reappearing.