This must be one of the oldest stories of humans being helped my other animals.
The killer whales of Eden, Australia were a group of killer whales known for their co-operation with human hunters of other whale species. They were seen near the port of Eden in southeastern Australia between 1840 and 1930. A pod of killer whales, which included amongst its members a distinctive male called Old Tom, would assist whalers in hunting baleen whales.
Old Tom's role in the hunt was to alert the human whalers to the presence of a baleen whale in the bay by breaching or tail slapping at the mouth of the Kiah River, which is one of the smallest rivers, where the Davidson family had their tiny cottages.
This role endeared him to the whalers and led to the idea that he was “leader of the pack,” although such a role was more likely taken by a female (as is typical among killer whales), probably the whale known as Stranger. After the harpooning, some of the killer whales would even grab the ropes in their teeth and aid the whalers in hauling. The skeleton of Old Tom is on display at the Eden Killer Whale Museum, and wear marks can still be seen on his/her teeth from grabbing the ropes.
All those years ago people knew that killer whales were not the terrible killers they were made out to be. Those in the Captive Industry state that without captives people would still think orca were terrible vicious monsters, this proves that this would not have been the case as travel spread the word of these creatures would have spread too.
There story and eye witness accounts can be seen here.