Virigina Andrews-Goff and colleagues have published in Nature their research
pinpointing the migration paths of humpback whales N from Antarctica.
includes identifying for perhaps the first time that humpback whales may pause for days to forage for food
in certain select areas. Earlier thinking, based on the observations from whale hunters, was that little or no foraging was done on the N-ward migration.
from Eden, NSW, is one such humpback whale foraging hotspot. Little wonder then that cruisers meet whales there (and that Eden was a key site for killing and butchering whales not that long ago).
See the attached graphic of the humpback migration paths and hot spots: Whale hot spots TAS NSW TasmanS.jpg, about 125 KB
Read Andrews-Goff et al.'s paper: https://www.nature.com/articles/s41598-018-30748-4#Tab2