algae Green Visions: cyclotella algae adds its voice to story of climate change By Lisa Johnson • Jan 11, 2017 Gabrielle R. The good news is the cyclotella algae turning up in sediment samples from the Great Lakes aren't a problem - like blue-green algae is, for example. The bad news is that they're indicating a problem: in the food web and with climate change. Blue-green algae: "When in doubt, stay out" By Lisa Johnson • Jun 8, 2016 Here's the thing about blue-green algae: it's really a cyanobacteria. You can't identify it by sight or smell, but it could make you sick. Unless you're a dog, in which case, it could kill you.