- Kingdom: Animalia
- Phylum: Porifera
- Class: Demospongiae
- Order: Poecilosclerida
- Family: Microcionidae
- Scientific name: Antho dichotoma
- Norwegian: fingersvamp
The characteristic tree shape gives the impression of a coral formation on some distance. The branch diameter is usually less than 5 mm. The color is light grey or yellow. Individuals as tall as 35 cm have been reported.
This a deep water species, usually found deeper than 40 meters, more frequent below 100 meters. In the large fjords, like the Trondheim Fjord, it may be encountered already at 25-30 meters.
It is well known in the North Atlantic, from the Arctic, along the Norwegian coast and around Ireland.