An interoperable online network of marine and climate data resources. The Australian Ocean Data Network is a single access point for marine data published by AODN contributors. The Portal incorporates a catalogue of metadata, a search interface driven by facets utilising controlled vocabulary terms, and a map interface that can be used to interact with AODN datasets and offers data download in a number of formats. The database contains information on the functional group of the species, which can aid analysis. Functional groups include diatoms, dinoflagellates, flagellates, ciliates (including tintinnids), silicoflagellates, and cyanobacteria. Once downloaded and binned as required, data are suitable for use in the creation of ecological indicators.