Bifurcariopsidaceae Durvillaeaceae Fucaceae Himanthaliaceae Hormosiraceae Notheiaceae Sargassaceae Seirococcaceae Xiphophoraceae The Fucales (fucoids) are an order in the brown algae (class Phaeophyceae).

The list of families in the Fucales, as well as additional taxonomic information on algae, is publicly accessible at Algaebase.

[1] The class Phaeophyceae is included within the division Heterokontophyta.

[3] They include some of the largest organisms in the sea, but some are small and fine in structure.

The Fucales include some of the more common littoral seaweeds and the members of the order have the typical seaweed construction: a holdfast, stipe, and lamina.