The smallest unit of listing is an ESU.... evolutionary significant unit.

GH chum belong to a HUGE unit... the Pacific coast chum.

Basically, in the ESA world, there's three small distinct ESU's for chum... Columbia R, Puget Sound, and Hood Canal.

Then there's this giant "other" basket for the rest.... Pacific Coast... which includes No. CA, OR, and WA coasts.

The entire ESU must be threatened to achieve a listing. And it may well be that the entire ESU is in deep doo doo. Proving it over over such a wide range over three states is another matter altogether.
"Let every angler who loves to fish think what it would mean to him to find the fish were gone." (Zane Grey)

"If you don't kill them, they will spawn." (Carcassman)

The Keen Eye MD
Long Live the Kings!