dangers faced fishes
tigers
A "snag" in Huck Finn refers to a submerged tree or branch in a river that poses a danger to passing boats. These snags were obstacles for Huck and Jim as they navigated the Mississippi River on their raft, symbolizing the challenges and dangers they faced on their journey.
There were many dangers of the Nile, hippos and crocodiles which are very dangerous.
Piranas & Anacondas
Families faced starvation, drowning while crossing a river, diseases like cholera, freezing in a snowstorm, mud slides, or ambush by native Americans.
The same as any other river but including crocodiles.
River rapids had to turn back
They must face predators, oil slicks and pollution which can lead to instant death or death by killing the things they eat. They also will face man made materials that may entangle them.
Heat and possible lack of water.
Rhine river
the nile crocodile and especially the nile monitor
pls tell me how to write report on flood