The overriding theory is that it's a bloom of algae brought on by rising water temperatures.

Second Noctiluca bloom we have had in the last 4 weeks

A group that monitors shellfish toxin levels is warning Juneau residents not to consume shellfish from locations in the Auke Bay area.

In Southeast Alaska this summer, researchers have seen extremely high levels of harmful toxins in mussels and clams plucked from beaches.