A new study recently came out from the Department of Conservation, Wellington, New Zealand, that uses a matrix approach to evaluate ecosystem services provided by a number of marine species.
The list of species evaluated included seaweeds, crustaceans, worms, and more. The services provided were broken into three main categories: habitat & supporting services , regulating services, and provisioning services.
While this study was New Zealand focused, it serves as a good reference of positive impacts by a species. Furthermore, a number of the study species are currently farmed and this study could be useful in aquaculture spatial planning.
The paper can be viewed here