Skull Island Python is a giant reptile from the 1976 remake of King Kong. It's large size was most likely due to the high oxygen levels on the island.
One was seen coming out of the distance when Dwan screamed. When Jack came to rescue Dwan, The giant snake emerges and quickly is engaged by King Kong 1976. The snake wrapped around Kong attempting to strangle the primate with its powerful coils but ultimately Kong's brute strength allowed him to pry the Python off of him and break the animal's jaw in a violent manner, thus killing the serpent.