Sargassum n. : A genus of algae including the gulf weed.

Example:
Sargassum fish and green spotted puffer?

Taxonomy
Sargassum muticum, species, genus, Strangford Lough, free encyclopedia, invasive, seaweed species, the Sargasso Sea, class Phaeophyceae, seaweed, several species, Life history, coral reefs, planktonic, drift, beds, Gulfweed, rocks.

Defination from the web:
Sargassum was named by the Portuguese sailors who found it in the Sargasso Sea after a species of rock rose (Helianthemum) that grew in their ... Sargassum is also cultivated and cleaned for use as an herbal remedy. ...