This document summarizes a conference presentation on collecting traditional ecological knowledge (TEK) from fishers in Galicia, Spain to inform fisheries governance. Researchers interviewed fishers to map benthic habitats, resource distributions, fishing grounds, and the relationships between species and habitats using ethnographic tools. They weighted and validated the fishers' spatial data before processing it in a geographic information system. The study found fishers already involved in co-management more willing to participate. Clear mapping products generated greater involvement while ensuring fishers owned the results helped build trust.