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Image description: This ocean creature, referred to as “dandelion,” was discovered by geologists during a 1977 ocean expedition. Scientists now know that it is a siphonophore, a relative of the Portuguese man-of-war. Animals like the siphonophore live near hydrothermal vents and thrive under harsh conditions like high pressure, steep temperature gradients, and high concentrations of toxic chemicals. 
Image courtesy of NOAA Okeanos Explorer Program, Galapagos Rift Expedition 2011

Image description: This ocean creature, referred to as “dandelion,” was discovered by geologists during a 1977 ocean expedition. Scientists now know that it is a siphonophore, a relative of the Portuguese man-of-war. Animals like the siphonophore live near hydrothermal vents and thrive under harsh conditions like high pressure, steep temperature gradients, and high concentrations of toxic chemicals. 

Image courtesy of NOAA Okeanos Explorer Program, Galapagos Rift Expedition 2011