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.
dangers faced fishes
at sea the biggest problem the fishes face is oil spils...in river some kinda pests may cause disease...and garbages from urban areas are mostly dumped in river...industrial effluents let into the sea causes trouble too...
Fishes
Yes. He faced a lot of dangers.
the home of the fishes is in the ocean,sea,river,aquarium,etc.
This is clearly homework and Wiki will not help you cheat. Time to get to work. Sit down and write of list of things that have to do with fish and oceans/rivers/seas. Problems that they have, dangers they face, what does pollution do?, are they overfished? think about oil spills. Now, write.
racial dicrimination
One of the main dangers that Perseus faced was the gorgon, Medusa.
as i know there are 9,000 fish in the yangtze river.
tigers
Salmon.
bass other fishes