What is the meaning of scientific name dascyllus melanurus?

Question

where did it originate and what it means broken up.

Answer 1

The common name of Dascyllus melanurus is four-striped damsel, syn. black-taled dascyllus:

http://animal-world.com/encyclo/marine/d...

Taxonomy:

http://en.wikipedia.org/wiki/Dascyllus

"Melanurus" means "black taled" and Dascyllus comes from the sea monster Scylla, which was said to  have 12 feet, six necks and six mouths, with three rows of- teeth in each.

http://chestofbooks.com/reference/The-Ne...

These attributes were the cause of the relevance of scyllus to ( killing ) sea anemones and the translation of Dascyllus means belonging to sea anemones.

The "literal translation" of Dascyllus melanurus means a black-taled fish living near a sea anemone.