Seaweed

Seaweed is a world object in Fallout 4 and Fallout 76. It is also mentioned as a consumable in Fallout 2.

Characteristics
A dark greenish water plant. When it decomposes, it has a bad smell. The Shi in post-war San Francisco eat it alongside fish.

Locations
Frequently found in bodies of water.

Appearances
Seaweed appears in Fallout 4 and Fallout 76, and is mentioned in Fallout 2.