In the context of the Blue Growth strategy, the need for services that collect and combine Environmental Observation (EO) data with aquaculture data has been identified by the EU. In this context, fundamental services are needed to monitor the spatial distribution of human activities including aquaculture and fishing, allowing for performance analysis based on environmental and socio-economic indicators. This tutorial highlights two VREs developed by BlueBRIDGE that support a computing intensive ontology driven feature analysis of Synthetic Aperture Radar (SAR) and multispectral optical imagery (using Sentinel-1 and -2 data, and Very High Resolution optical imagery), where the results are displayed on maps for human reviewers. The first VRE is specialised in recognizing offshore fish farming in Greece, whilst the second is specialized in identifying coastal aquaculture ponds in Indonesia.