How many spices of fish are in the amazon river?

The Amazon River is home to an incredibly diverse array of fish species, with estimates ranging from 2,000 to over 5,000 different species. This rich biodiversity includes well-known species like the piranha and the arapaima, as well as countless smaller and lesser-known varieties. Researchers believe that many species remain undiscovered, highlighting the Amazon's importance as a critical habitat for aquatic life.