How many animals are in the River Wharfe?

Its over 9000 :)

Hundreds

There are over 2,100 fish that are known in the river and more being discovered each year.There is also over one third of the worlds species living in the Amazon Rainforest.

Congo River is 2,914 miles long. The river and surrounding tropical rainforest are home to over 400 mammal species, over 1,000 types of birds and more than 10,000 varieties of flora. · Antelopes ·...

Loads of different mammals, fish, reptiles and birds can have creatures living off them (parasites). Most parasites don't actually kill the creature immediately, but to answer your question THOUSANDS.