Nile crocodiles (Crocodylus niloticus)
Yes, they are very common.
Congo river, Zambezi river, Mezeranian river, and people they do live in the Nile river
a hippo lives in khartoum and south of zambezi river
There is the Bull Shark also known as the Zambezi Shark, these sharks can live in both fresh and salt water
Crocodiles, fish, kangeroos
Elephants, hyenas, zebras, hippos, crocodiles, lions.
They live! (Swim, eat, breath, Hunt and breed)
Crocodiles, Snakes, Fish.
Yes, they can. For instance in the river Nile there are lots of crocodiles.
other animals that live in the river like maybe piranhas or crocodiles or alligators. \
Crocodiles spend most of their time in the water, though will haul out onto the river bank to bask in the warmth from the Sun.
Since the darling River is in Australia then aquatic animals native to Australia will live in it. I would say that Saltwater crocodiles and fish would live in it!