A strange red alga has turned up on on the southwest coast of Norway

The other day this strange red alga, about 60 cm long, was picked up from shallow water on the coast of Jæren (Sirevåg) by Erling Svensen (photo Vivian Husa). It does not look like any red alga known from Norway. It is still a mystery what it is, but after inquiring around, and a round with algal keys by Vivian and Mette it seems like Helminthocladia calvadosii (not recorded in Norway) or a strange Grateloupia can be possible options. Samples of the specimen will be barcoded, and maybe this will give a closer answer. If someone sees what it can be please contact the web page or Vivian Husa.