I assume you're asking for the scientific name of the Black Anaconda, since 'black anaconda' would be a common name.
Unfortunately, 'black anaconda' is not a well-known common name, so it is difficult to guess which species it refers to. This is why scientific names are used when the identity of a species is important.
There are only four species in the genus Eunectes, so that dramatically cuts down on the possibilities.
Eunectes beniensis: The Bolivian Anaconda (I can GUESS that this MIGHT be the black anaconda, because these animals tend to be very dark in color, but I was unable to find any reference to that being a known common name for them).
Eunectes deschauenseei: The Dark-Spotted Anaconda (other names for this animal include De Schauensee's anaconda).
Eunectes notaeus: The Yellow Anaconda (other names for this animal include Paraguayan anaconda).
Eunectes murinus: The Green Anaconda (The animal everyone thinks of when you say 'anaconda', and the heaviest snake species on Earth). Other names for this animal include 'common anaconda', and 'water boa'.
Anacondas are a genus of boas that are all native to South America. They use constriction to kill their prey, and give live birth to their young.
Yellow anacondas prey on fish, reptiles, and geese.
The capybara is the most common animal taken by anacondas, but they will take many animals, what ever they can overpower.
Anacondas are not endangered, check IUCN Redlist.
medium size mammals including world largest rodents capybaras
caiman lizard skeletons have been found inside the arapaima fish. I would aslo speculate that many south american snakes have also found this orange and green lizard as a yummy meal.
Green anacondas, jaguars, and black caimans prey on common caimans.
Adult anacondas are eaten by black caimans and jaguars.
Large black caimans and jaguars prey on green anacondas.
whatv do anacondas eat
yellow and green and black
A black panther may be a black leopard or a black jaguar. Colectively they are called black panthers - which is the common name.
Anacondas are South American boas, so you can call them either way.
Yellow anacondas prey on fish, reptiles, and geese.
Alligators do not live where anacondas live. They live in different continents. Large female green anacondas prey on black caimans, but mainly the females and small males.
Spectacled caimans and common caimans are common food for anacondas and jaguars. Large black caimans have no predators.
Jaguars, black caimans, and very large groups of piranhas eat anacondas.
The scientific name for the Black Swallowtail is Papilio polyxenes.