What does "gulfweed" mean?

sargassum; algae of the genus Sargassum.

What is a synonym for "gulfweed"?

Common synonyms include: sargassum, algae, bean, bracken, brown alga, climber.

noun

noun ·Rare ·Advanced level

Noun

1
sargassum; algae of the genus Sargassum. uncountable, usually
2
brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea wordnet

From gulf (“Gulf of Mexico”) + weed.