Introduction Seaweed samples can be divided into two groups: Small samples (½-3 kg wet weight (ww)) often used for chemical content analyses including seasonal variation and testing different cultivation conditions or preliminary lab scale experiments on storage, extraction, separation, fermentation, etc. Larger samples (>3 kg ww) for lab- or pilot scale experiments on storage, extraction, separation, fermentation, etc. Seaweed samples will always have the following information-tracks: Sample Code: A ID containing the most important information and the sample code will follow the sampled biomass from harvest to final research results. Seaweed Processing Code: The sample code will be extended with 8 digits and 1 letter if processing of biomass occurs. Batch Number: A code describing details about the harvest and origin of the seaweed. Sample Overview: An Excel file describing all details about the sample: first sample code, then species, grinding, freezing/drying specifications, seeding and harvesting information, planed aim of the sample (e.g. polysaccharides), place stored, seaweed processing details, analyse results, etc. Maintained by the sample provider.