In water: likely the croc. On land, it would probably be a stand-off.
Depending on the size and strength of the mugger crocodile, the mugger crocodile has a better chance in water than on land. Since water buffaloes are very large and are adapted to swim in water, they are able to fight and maul a mugger crocodile with their horns if the crocodile is not careful. If the mugger crocodile and the water buffalo fought on land, the water buffalo would easily trample the mugger crocodile to death.
crocodile wins
Probably the crocodile.
It is a kind of a draw between a nile crocodile and a bull cape buffalo if the cape buffalo does not gore the crocodile.
shark
A polar bear would win the fight on land if it clawed the crocodile's head and flipped its body to claw its stomach. In water, the crocodile would definitely win the fight.
the biggest animal will Win the fight
crocodile
An elephant would crush a crocodile on land and in shallow water. In deep water, the elephant would drown.
the crocodile if it is one of the large species
The Rhino would win. The Rhino can knock the Buffalo with his horn and Rhino are stronger than Buffalo.
The crocodile could win, but would get badly injured by the ox and the cattlebeast's body.