Humpbacks

Saltwater crocodiles are thought to pose little danger to the whales unless the humpbacks become stranded on a sandbank.

The humpbacks’ annual journey from Antarctica to subtropical waters along Australia’s east and west coasts is one of nature’s great migrations.

Scientists say humpbacks face a combination of other threats including the overharvesting of krill, pollution, habitat degradation, and entanglement in fishing nets.

The research into migrating humpbacks was conducted about one kilometer off the coast of Queensland, north of the state capital, Brisbane.