• Kingdom: Plantae
  • Phylum: Ochrophyta
  • Class: Ulvophyceae
  • Order: Fucales
  • Family: Fucaceae
  • Scientific name: Fucus serratus
  • Norwegian: sagtang


This brown seaweed is also known as serrated wrack, obviously from the serrated edge of the fronds. The fronds are flat, 1-3 cm wide and up to one meter long. It branches irregularly. It does not have any bladders. The entire plant may grow to a height of almost 2 meters. The color is olive-brown.


It is common in lower tidal and subtidal zones.


It is distributed on both sides of the North Atlantic Ocean, as far south as the Canary Islands.