Tipologi mangrove merupakan jenis–jenis vegetasi mangrove yang menyusun ekosistem mangrove dan habitat biota termasuk epifauna di Kawasan konservasi mangrove di Desa Setabu. Tujuan untuk mengetahui tipologi mangrove dan epifauna serta kaitannya dengan kondisi lingkungan di Desa Setabu. Penelitian dilaksanakan bulan Juni-Juli 2022 di Desa Setabu Kecamatan Sebatik Barat Kabupaten Nunukan Provinsi Kalimantan Utara. Penelitian di lakukan di 3 lokasi yaitu kawasan konservasi mangrove, wisata temunung pagun dan pemukiman warga. Pengambilan sampel sebanyak 3 plot dengan 3 kali ulangan. Data primer diambil secara in-situ yaitu identifikasi jenis spesies mangrove, banyaknya jumlah jenis spesies mangrove, klasifikasi biota epifauna dan jumlah biota spesies epifauna. Faktor kondisi lingkungan mangrove di Desa Setabu dilakukan pengukuran Kepadatan jenis dan indek keanekaragaman epifauna, dan Parameter fisika kimia perairan. Pengumpulan data dilakukan secara in-situ dan ex-situ. Penelitian ini dilakukan dengan menggunakan
metode Purposive sampling. Hasil penelitian menunjukkan kerapatan jenis mangrove yang mendominasi yaitu Avecennia alba dengan kerapatan rata-rata 2,87% ind/m2 hasil penelitian mengenai frekuensi jenis yang tergolong baik. Dominansi jenis mangrove Desa Setabu masuk dalam kategori Rendah, kemudian Indeks Nilai Penting (INP) yang didapatkan masuk dalam Kategori baik. Pada indeks Keanekaragaman dan Indeks Keseragaman Desa Setabu tergolong dalam Kategori Sedang dan seragam. Epifauna yang terdapat pada ekosistem mangrove Desa Setabu memiliki beragam jenis dan kondisi Perairan Desa Setabu masih masuk dalam kategori normal, karena suhu, salinitas dan pH masih masuk dalam standar baku mutu suatu perairan. Kondisi lingkungan Desa Setabu masih dalam kisaran untuk pertumbuhan optimum mangrove.
Kata kunci: Epifauna, Kondisi Lingkungan, Tipologi Mangrove

Mangrove typology is the types of mangrove vegetation that create the mangrove ecosystem. The purpose of the research was to find out the typology of mangroves and epifauna and its relation to environmental conditions in Setabu Village. The sample selection technigue used purposive sampling. The research was conducted in June-July 2022 in Setabu Village, West Sebatik District, Nunukan Regency, North Kalimantan Province. The research was conducted in 3 locations, namely mangrove conservation areas, temunung pagun tourism and residential areas. Sampling as many as 3 plots with 3 replications. Primary data were taken in-situ, namely the identification of mangrove species, the number of mangrove species, the classification of epifauna biota and the number of epifauna species. Factors of mangrove environmental conditions in Setabu Village were measured species density and diversity index of epifauna, and physical parameters of water chemistry. Data collection is done in-situ and ex-situ. The result of the research showed that the density of mangrove species which dominated was Avecennia alba with an average density of 2.87 ind/m2 and regarding the freguency of species classified as good. The dominance of mangrove species in Setabu Village is in the Low category, then the Index of Important Value (INP) obtained is in the good category. In the diversity index and similarity index, Setabu Village is classified as Moderate and similar. Epifauna found in the mangrove ecosystem of Setabu Villagehas various types and the condition of the waters is still in normal category, because temperature salinity and pH are still in the standard water guality. The environmental condition of Setabu Village is still good for optimum mangrove growth. Keywords: Epifauna, Environmental Conditions, Typology of Mangrove