front cover of Jellyfish
Jellyfish
A Natural History
Lisa-ann Gershwin
University of Chicago Press, 2016
Jellyfish, with their undulating umbrella-shaped bells and sprawling tentacles, are as fascinating and beautiful as they are frightening and dangerous. They are found in every ocean at every depth, and they are the oldest multi-organed life form on the planet, having inhabited the ocean for more than five hundred million years. In many places they are also vastly increasing in number, and these population blooms may be an ominous indicator of the rising temperatures and toxicity of the world’s oceans.

Jellyfish presents these aquarium favorites in all their extraordinary and captivating beauty. Fifty unique species, from stalked jellyfish to black sea nettles, are presented in stunning color photographs along with the most current scientific information on their anatomy, history, distribution, position in the water, and environmental status. Foremost jellyfish expert Lisa-ann Gershwin provides an insightful look at the natural history and biology of each of these spellbinding creatures, while offering a timely take on their place in the rapidly changing and deteriorating condition of the oceans. Readers will learn about immortal jellyfish who live and die and live again as well as those who camouflage themselves amid sea grasses and shells, hiding in plain sight.
 
Approachably written and based in the latest science and ecology, this colorful book provides an authoritative guide to these ethereal marine wonders.
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front cover of Stung!
Stung!
On Jellyfish Blooms and the Future of the Ocean
Lisa-ann Gershwin
University of Chicago Press, 2013
Our oceans are becoming increasingly inhospitable to life—growing toxicity and rising temperatures coupled with overfishing have led many marine species to the brink of collapse. And yet there is one creature that is thriving in this seasick environment: the beautiful, dangerous, and now incredibly numerous jellyfish. As foremost jellyfish expert Lisa-ann Gershwin describes in Stung!, the jellyfish population bloom is highly indicative of the tragic state of the world’s ocean waters, while also revealing the incredible tenacity of these remarkable creatures.
 
Recent documentaries about swarms of giant jellyfish invading Japanese fishing grounds and summertime headlines about armadas of stinging jellyfish in the Mediterranean and Chesapeake are only the beginning—jellyfish are truly taking over the oceans. Despite their often dazzling appearance, jellyfish are simple creatures with simple needs: namely, fewer predators and competitors, warmer waters to encourage rapid growth, and more places for their larvae to settle and grow. In general, oceans that are less favorable to fish are more favorable to jellyfish, and these are the very conditions that we are creating through mechanized trawling, habitat degradation, coastal construction, pollution, and climate change.
 
Despite their role as harbingers of marine destruction, jellyfish are truly enthralling creatures in their own right, and in Stung!, Gershwin tells stories of jellyfish both attractive and deadly while illuminating many interesting and unusual facts about their behaviors and environmental adaptations. She takes readers back to the Proterozoic era, when jellyfish were the top predator in the marine ecosystem—at a time when there were no fish, no mammals, and no turtles; and she explores the role jellies have as middlemen of destruction, moving swiftly into vulnerable ecosystems. The story of the jellyfish, as Gershwin makes clear, is also the story of the world’s oceans, and Stung! provides a unique and urgent look at their inseparable histories—and future.

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