Canaries in the coalmine

Words by Lisa-Ann Gershwin
llustration by Rachel Koning<br />
Beauty and the beast: the electric-blue coloration of the Portuguese man o’ war Physalia physalis is a natural warning. When armadas of these strange jellyfish blow towards shore, run! It is estimated that they sting more than a million people a year, sometimes fatally.<br />
Photo by Matty Smith