Common name: Fucales

Fucales is an order of brown algae found in marine environments worldwide. They are notable for their large, complex thalli that often resemble true plants. Members of this order, such as the well-known genus Fucus, are commonly found in intertidal zones and are important ecologically, providing habitat and food for various marine organisms. In reef aquariums, they can be both beneficial as nutrient exporters and problematic if growth is unchecked. Hobbyists may appreciate their natural appearance and utility in refugium setups, where they can help control nutrients.

1. 
   Common name: An Chasfheamainn

   Scientific name: Fucus spiralis
2. 
   Common name: Bladder Wrack

   Scientific name: Fucus vesiculosus
3. Common name: Sargassum filipendula

   Scientific name: Sargassum filipendula
4. 
   Common name: Gulfweed

   Scientific name: Sargassum fluitans
5. 
   Common name: Sargassum Shrimp

   Scientific name: Sargassum hystrix
6. Common name: Sargassum johnstonii

   Scientific name: Sargassum johnstonii
7. Common name: gulf weed

   Scientific name: Sargassum natans
8. Common name: Sargassum polyphyllum

   Scientific name: Sargassum polyphyllum
9. 
   Common name: Gulfweed

   Scientific name: Sargassum sinicola
10. 
    Common name: Sargassum Weed

    Scientific name: Sargassum vulgare