- Kingdom: Plantae
- Phylum: Rhodophyta
- Class: Florideophyceae
- Order: Ceramiales
- Family: Delesseriaceae
- Scientific name: Delesseria sanguinea
- Norwegian: fagerving
A conspicuous and easily identifiable seaweed that can grow to a length of 30 cm and width of 4cm. The fronds are oval or feather-shaped. The 1 cm stipe continue in to a visible set of midribs. In the fall the leaf substance between the the midribs is lost and only the midribs remains. New fronds grow in the spring. The color is red with a brownish tint.
It is found from the subtidal zone and down to 30 meters. It can sometimes be found on stipes of other seaweeds.
It is common in the North East Atlantic Ocean, from Murmansk to, and including, the Mediterranean.