What algae can make rafts in the Saragossa Sea?

Answer 1

Sargassum Weed, sceintific name Sargassum natans

This brown algae, which exists in vast floating masses in the Sargasso Sea of the north central Atlantic, is commonly found washed ashore on the beaches of northeast Florida following sustained easterly winds such as during northeasters and hurricanes. Although probably considered a smelly nuisance by most beach-goers, the floating mats serve as a source of food or home to a wide variety of sea life to include crabs, bryozoans, and nudibranchs. A careful examination of the beached algae will sometimes reveal some of these inhabitants still in residence.

Answer 2

Sargasso Sea
Pronounced: s�rgaso

The Sargasso sea is part of the North Atlantic Ocean, lying roughly between the West Indies and the Azores. Here, the heart of the Bermuda Triangle is covered by the strangest and most notorious sea on the planet -The Sargasso Sea so named because there is a kind of seaweed which lazily floats over its entire expanse called sargassum. Catching sight of these huge mats of seaweed have always marked the perimeter of this peculiar sea. Columbus himself made note of it. Thinking land was nearby, he fathomed the sea, only to find no bottom. The bottom is, in fact, miles below on the Nares Abyssal Plain.