algae

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.

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.