Extreme Jellyfish

There are some 2,000 species of jellyfish. Some are tasty, others will kill you with the tap of a tentacle. Here are nine varieties that really stand out

(Reinhard Dirscherl / Alamy)


Jellyfish near mineral chimneys in Costa Rica
(Maura McCarthy)
Jellyfish thrive in all sorts of climes, but in 2007 scientists from the Woods Hole Oceanographic Institution and other organizations were surprised to find them congregating near the mouths of “black smokers,” undersea mineral chimneys that spew water as hot as 626 degrees Fahrenheit. The jellies, discovered off Costa Rica’s Pacific coast at a depth of 8,500 feet, are a distinctive pink color, somewhat reminiscent of boiled shrimp.

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