It’s easy to think that all fish belong in the sea. But not all fish belong in all parts of the sea….

Threatening local ecosystems, disrupting and at times eradicating other species entirely and even disrupting economies, our boats, large and small, can transport different creatures around our waters, and at times, across whole oceans.

In this episode, we’ll be looking how species spread across our planet, just what this costs us and how the warming of our oceans is likely to make this even more pronounced..

Joining our host, Holly, is marine spatial ecologist and all-round conservation superstar, Dr Alexandra Davies. She is a postdoctoral fellow at the University of Alberta and a true expert on this very matter.