- Kingdom: Plantae
- Phylum: Chlorophyta
- Class: Ulvophyceae
- Order: Bryopsidales
- Family: Codiaceae
- Scientific name: Codium fragile
- Norwegian: pollpryd
This characteristic seaweed has many common names; green sea fingers, dead man's fingers, felty fingers, stag seaweed and oyster thief, among others. It is usually 10-20 cm tall, the branches are 3-10 mm thick and have the consistency of a sponge. They are often branched in two-splits in irregular intervals.
It is usually found in pools in the tidal zone.
It was believed that it originates from the western parts of the Pacific Ocean, but has become widespread in the North Atlantic Ocean as well. Recent genetic studies indicates that this is not the case and that this is a species specific for the North Atlantic Ocean.