If you’ve ever swum in the Gulf of Mexico, you know … watch out for jellyfish. The swarms can be massive under the best of conditions, but if the ecosystem is nudged toward the unhealthy side, look out. The swarms of jellyfish become colossal. In this way, scientists say, jellyfish in the Gulf of Mexico are like a canary in the coal mine, warning of possibly dangerous environmental changes in the water.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. Today, as Lead Editor at EarthSky.org, she helps present the science and nature stories and photos you enjoy. She also serves as one of the voices of EarthSky on social media platforms including Facebook, Twitter and G+. She and her husband live in Tennessee and have two grown sons.