Mangrove ecosystems are coastal ecosystems that provide many ecological and economic benefits, one of which is as a fishing ground for small-scale fishermen. Pangandaran District is an area in southern West Java that has a mangrove ecosystem and serves as a fishing ground. This study aims to analyze the diversity of fishermen's catches in the Pangandaran mangrove ecosystem. The mangrove ecosystems in this region are spread across four locations, namely Babakan, Bojongsalawe, Batukaras, and Nusawiru. The research was conducted from September 2025 to January 2026 by collecting data on the catches of fishermen using cast nets, traps, and fishing rods around the mangrove ecosystem. The catch consisted of 20 families and 27 species. The main catch included Scylla serrata, Litopenaeus vannamei, Penaeus monodon, Fenneropenaeus merguiensis, Acanthopagrus berda, Acanthopagrus australis, Caranx ignobilis, Eleutheronema tetradactylum, Lates calcarifer, and Epinephelus coioides. The diversity index (H’) ranged from 2.71 to 3.01, the evenness index (E) 0.88 to 0.95, the dominance index (C) 0.06 and 0.09, and the species richness index (d) 3.44 and 4.50, indicating that the catch community is in the moderate to high diversity category with low dominance. The mangrove ecosystem in Pangandaran supports moderately to highly diverse catch communities with low dominance, indicating the important role of mangroves as fishing grounds for small-scale fisheries.