WDFW doesn't set hunting and fishing license requirements and fees. That is done by the Washington Legislature. Several times in the long past, WDF/WDFW has requested that the legislature establish some sort of license requirement for taking eulachon/smelt. It was mostly rejected by SW WA legislators that felt it was simply another money grab by the agency and there should be a freebie for some family fun .....and General Fund contributes to this food fish anyway and there are no expensive hatcheries and large scale management costs (at the time). Of course things are different now.

Seaweed is covered under a Combination License and/or Shellfish/Seaweed license. As best I can tell, seaweed license requirement was first set in 1994 under Senate Bill 6125.