Why black moor fish is called goldfish?

Black Moor goldfish are called goldfish because they are members of the goldfish species (Carassius auratus). The name "goldfish" refers to the entire species, not just the traditional golden-colored variety.

Here's why:

* Common Ancestry: All goldfish varieties, including the Black Moor, share the same ancestor, the Prussian carp. They were selectively bred over centuries to develop their unique traits.

* Scientific Classification: Black Moors are scientifically classified as *Carassius auratus* just like other goldfish varieties.

* Evolutionary Lineage: The distinctive features of the Black Moor, like its telescopic eyes and black scales, evolved through selective breeding from the original *Carassius auratus*.

So, even though the Black Moor has a very different appearance than the classic golden goldfish, it's still considered a goldfish due to its shared genetic heritage and scientific classification.