Calves can vocalize within days of birth, but sound production is shaped with age. Enemies and Endangerment A whale does not have very many enemies. One of a whale's most dangerous enemies is the human species. Other threats to whales are toxins, oil spills, diseases, and garbage in the oceans. Oil spills are very dangerous because not only do they kill whales, but they will kill any thing in the oceans.
Garbage kills marine life around the world every year.
There are many different toxins in the world such as radiation, but humans have been making an attempt to clean it up. The Whales Called the Killers. Wildlife Notebook Series.