Crossword clue: brown algae with rounded bladders forming dense floating masses in tropical atlantic waters as in the sargasso sea

The most common answer is gulfweed (8 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

gulfweed 8 letters wn-def

brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea

sargassum 9 letters wn-def

brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea