Courtesy of Noma Sloan displays a sea urchin he plucked from the sandy seafloor ... Urchins have hundreds of adhesive tube feet and move over the sandy seafloor at a fairly leisurely pace.

In our warming oceans, marine species are moving into new areas and "re-engineering ... like the Longspined Sea Urchin (Centrostephanus rodgersii) in Tasmania, can be a sustainable option to ...