Salah satu kegiatan nelayan tangkap yang ada di desa ruhui rahayu, kabupaten bulungan adalah menangkap kepiting bakau (scylla sp.) sehingga dilakukan penelitian tentang efektivitas umpan yang berpengaruh terhadap hasil tangkapan kepiting bakau (scylla sp.). tujuan dari penelitian ini adalah mengetahui jenis umpan yang lebih efektiv dalam pengoperasian bubu lipat kepiting agar mendapatkan hasil yang lebih maksimal. penelitian ini dilaksanakan selama 1 bulan sejak tanggal 25 februari – 25 maret 2020 di desa ruhui rahayu, kecamatan tanjung palas utara, kabupaten bulungan dengan metode purpose sampling. penelitian ini menggunakan 3 jenis perlakuan dimana perlakuan 1 (ikan gulama basah), perlakuan 2 (ikan gulama kering), perlakuan 3 (kelapa busuk) dan kontrol (tanpa umpan). berdasarkan hasil penelitian, bahwa perlakuan 2 (ikan kering) memiliki nilai efektivitas paling besar dengan angka 37,5%. kata kunci: bubu lipat, desa ruhui rahayu, ikan gulama kering, kepiting bakau

Catching mud crabs (scylla sp.) is one of the hobbies of fishermen in ruhui rahayu village, bulungan regency, so the research was carried out on the effectiveness of bait that impacts the catch of mangrove crabs (scylla sp.). the purpose of this research was to find out which type of bait was most successful in running the crab folding trap to get the best outcomes. this study took place in ruhui rahayu village, north tanjung palas district, bulungan regency, for one month from february 25 to march 25, 2020, using a purpose sampling approach. treatment 1. (wet gulama fish), treatment 2 (dried gulama fish), treatment 3 (rotten coconut), and control (without bait) were employed in this investigation. based on the research result, treatment 2 (dried gulama fish) had the highest effectiveness value, with a figure of 37.5%. keywords: mangrove crab, dried gulama fish, dome folding. ruhui rahayu village