Characium marinumCharacium marinum is a species of green algae.DescriptionCharacium marinum is a microscopic unicellular elongated oval algae growing attached epiphytically by a stalk various algae. The single chloroplast is parietal with a single pyrenoid.EcologyEpiphytic on other marine algae. and eastern CanadaDistributionRecorded from Svalbard, Sweden, once in Ireland County Down, twice in Great Britain, under-recorded. and eastern Canada.StatusThe taxonomic status of this alga is unclear. According to the marine biologist T. Levring, Characium marinum probably represents germlings of Cladophora, a genus of marine algae.