摘要:The research was conducted to study the effect of salinity on the growth of Banggai Cardinalfish Pterapogon kauderni . The research was set up in completely randomized design with different salinity as the main variable, i.e. 27, 29, 31, 33 and 35 ppt with 4 replications . The result showed that the lowest salinity (27 ppt) resulted in the highest fish growth (1.625 g). Keywords : Growth, salinity, Banggai Cardinalfish ABSTRAK Penelitian telah dilakukan untuk mengetahui pengaruh salinitas terhadap pertumbuhan ikan kardinal banggai Pterapogon kauderni yang dipelihara dalam akuarium. Penelitian menggunakan Rancangan Acak Lengkap dengan 5 perlakuan salinitas, yaitu 27, 29, 31, 33 dan 35 ppt, masing-masing 4 kali ulangan. Hasil penelitian menunjukkan bahwa pertumbuhan berat mutlak (1,625 g) tertinggi diperoleh pada salinitas 27 ppt. Kata kunci : Pertumbuhan, salinitas, Kardinal Banggai