Here's why there are no 7 classifications:
* One Species: There is only one species of Amazon River dolphin, Inia geoffrensis.
* Color Variation: The pink coloration is not a defining characteristic for a separate classification. It is a variation in pigmentation within the species, influenced by factors like age, diet, and blood flow.
* No Subspecies: While there are different populations of Amazon River dolphins, these populations are not considered distinct enough to be classified as subspecies.
Therefore, there is no need to speak of "classifications" of a pink dolphin. It is simply a color variation within the single species, Inia geoffrensis.