This guide presents an approach to measuring aquatic foods (AF) consumption in Timor-Leste that was developed by WorldFish in collaboration with the Commonwealth Scientific and Industrial Research Organisation (CSIRO). The guide attempts to capture consumption patterns in the first 1000 days of life among fishing communities in Timor-Leste and is aimed at government, development and research partners and practitioners who may wish to adapt and apply such methods to further understand AF consumption patterns in other contexts.