Preserving mangrove ecosystems is an important part of several global warming mitigation efforts. The latest information about the existence of mangrove ecosystems is important information for evaluating the current condition of mangrove forests. This research aims to examine the species that make up the Bagik Batu mangrove ecosystem in Jerowaru, Indonesia. Information related to the condition of the Bagik Batu mangrove ecosystem can be initial information for policy decisions by policymakers in formulating policies related to global warming mitigation. This research is descriptive (Survey). Area samples were taken using purposive sampling and the plot sampling method (random), and then many mangrove individuals were identified based on their morphological characteristics, starting from leaves, flowers, fruit, seeds, stems, and roots. In addition, the data used in this study are data on the number of individuals per species and environmental parameter data such as pH, temperature, salinity, and substrate type. The research results show that the Bagik Batu mangrove ecosystem consists of several types of mangrove species, namely Avicennia alba, Calotropis gigantea, Lumnitzera racemosa, Rhizophora apiculata, Rhizophora stylosa, and Sonneratia alba.