Scientists said the critically-endangered species had previously only been found in rivers and know pearl mussels have been discovered in the Scotland Lochs.
The Skagway Traditional Council is asking harvesters to avoid blue mussels until the population rebounds.
A person has died from paralytic shellfish poisoning after eating blue mussels and snails in the Aleutian Island community of Unalaska, state health officials confirmed Wednesday.
Massive amounts of the mussels clinging to the rocky shores and cliffs of the Bodega Marine Reserve were cooked in the June heat wave.