Crocodiles are not afraid of lions as crocodiles are apex predators, which means that crocodiles are not often naturally afraid of other animals.
However crocodiles do still respect the power of a large lion.
As for lions, lions are known to be cautious around water as a result of the presence of crocodiles.
Crocodiles can even prey on lions, especially when the lions are in the water.
Crocodiles being apex predators are not naturally afraid of most types of animals, including lions.
Crocodiles such as the nile crocodile can be larger and much more powerful than lions and a large crocodile, especially in the water can pose a very serious threat to a lion.
Lions also know that crocodiles are dangerous and can ambush them very easily and take them down.
Even lions just like crocodiles are apex predators and prefer to avoid any conflict that is unnecessary.
And while not a very common thing, crocodiles have been know to attack and kill lions, especially when the lions are in the water.
Although lions have also been observed hunting and eating of baby crocodiles but not the adult crocodiles.