A netted frame and a suction sampler were used to collect the samples from 25*25cm dimensioned quadrats on artificial reefs (of concrete) and floating platforms.

Study Extent Greece Major Ports (Heraklion, Patra, Rhodes, Pireaus) Quality Control WoRMS match taxa tool was used to validate the accepted scientific names, their authorships and their corresponding IDs. LifeWatch & EMODnet Biology QC tool was used to assess to what extend the dataset meets the EMODnet Biology Data Quality Criteria.