Macrobrachium rosenbergii merupakan komoditas hasil perikanan air tawar yang sangat potensial untuk dikembangkan dan memiliki kualitas tinggi. Informasi karakteristik morfometrik dan meristik udang galah ini masih minim. Oleh karena itu, dilakukan penelitian tentang morfometrik dan meristik udang galah pada bulan Desember hingga Januari 2020. Tujuan penelitian ini adalah untuk mengetahui karakteristik Morfometrik-Meristik udang galah hasil tangkapan bubu dasar di Perairan Muara Desa Tepian Sembakung, menggunakan metode purposive random sampling. Sampel udang yang diambil dari hasil tangkapan nelayan menggunakan alat tangkap bubu dasar ( berukuran 83 cm x 24 cm ). Sebanyak 150 sampel yang digunakan, terdiri dari 53 jantan (21,1-8 cm, 107,52-6,26 gram), 97 betina (57-7,8 cm, 57,29-6,57 gram). Secara umum terdapat perbedaan karakteristik pada udang jantan dan betina. Hubungan antara PT-PAb pada udang jantan sekitar 76,67%, PT-PK sekitar 99,83%, udang betina PT-PAb sekitar 66,48% dan PT-PK sekitar 99,88%. Karakter meristik udang galah sebagai berikut: jumlah duri rostum atas (5-15) dan jumlah duri rostum bawah (4-17). Berdasarkan data yang diperoleh, didapatkan bahwa pertumbuhan semua karakter yang diukur hampir bersifat allometrik.
Kata kunci: Morfometrik, Meristik, Bubu Dasar, Macrobrachium rosenbergii

Macrobrachium rosenbergii is the commodity product of freshwater fishery which is very potential to be developed and has such a high quality. Morphometric and meristic characteristics information of giant prawn are still minimal. Therefore, a research on morphometric and meristic of giant prawn was conducted by the researcher on December until Januari, 2020. The purpose of this research was to find out the Morphometric-Meristic characteristics of giant prawn caught by using the bubu dasar in estuary water of Tepian Sembakung Village, using the purposive random sampling method. The prawn samples were taken from fishermen’s catches using the bubu dasar (measuring 83 cm x 24 cm). There were 150 samples used in this research, consisted of 53 males (21,1-8 cm, 107,52-6,26 gram), 97 females (57-7,8 cm, 57,29-6,57 gram). Generally, there were differences in characteristics of male and female prawns. The relationship between PT-PAb in male prawns is around 76,67%, the PT-PK is around 99,83%, while the PT-Pab in female prawns is around 66,48% and its PT-PK is around 99,88%. The meristic characteristic of giant prawns are as follows: the number of top rostrum (5-15) and the number of bottom rostrum (4-17). Based on the data obtained, it was found that the growth of all characteristics measured were almost allometric. Key words: Morphometric, meristic, the Bubu Dasar, Macrobrachium rosenbergii