- Kingdom: Plantae
- Phylum: Ochrophyta
- Class: Phaeophyceae
- Order: Fucales
- Family: Sargassaceae
- Scientific name: Halidrys siliquosa
- Norwegian: skolmetang, skulpetang
This brown seaweed is usually 20-30 cm of height, but may occasionally reach as much as 2 meters. The color is yellow brown. The fronds are alternately and irregularly branched. The segmented air bladders are pod-shaped.
Found in the lower tidal zone and subtidal zone, often in current exposed locations.
It is known in the North East Atlantic Ocean.