John Turnbull helped survey coral reefs in Norfolk Island for the first time in eight years, and snapped marine life he didn't expect to see there.
The election of Joe Biden raised hopes of a new dawn in US environmental protections. But left-right views will continue to stymie progress, just as they do in Australia.
Artificial islands emerging from the oceans are regarded as 'engineering marvels'. But little attention is paid to how these human-made structures affect sea life.
Human-made debris such as plastic have vastly increased the numbers of marine species crossing the oceans, write Emma Johnston and Jim Carlton.