In shallow water, the hippo's size and devastating bite win. In deep ocean, the shark dominates.
Environment decides this completely. These two would realistically encounter each other in coastal or river-mouth waters โ shallow enough for both to operate.
In shallow water, the hippo's 1,800 PSI bite through 20-inch canines is devastating, and its 4,000-pound body can physically overwhelm the 5,000-pound shark through sheer aggression. Hippos are surprisingly agile in water they can touch bottom in.
In deep ocean, the shark's three-dimensional maneuverability, burst speed, and ambush-from-below strategy would be devastatingly effective against a hippo that's a poor deep-water swimmer.
The shark has a stronger bite (estimated 4,000+ PSI), is faster in water, and can attack from below โ the hippo's blind spot. In deep water, the shark's home turf advantage is enormous.
The hippo is extremely aggressive and comfortable fighting in water. Its jaws can open 180 degrees with 1,800 PSI through massive canines. In shallow water, the hippo's ability to stand and charge gives it devastating attack options.
Slight edge to the hippo in realistic encounter scenarios (shallow coastal/river water). In open ocean, the shark dominates. This is one of the most environment-dependent matchups possible.
Great White Shark also fights
Hippopotamus also fights