Milkfish cultivation in Muna Regency has not yet developed optimally, allegedly due to poor water circulation. Internal solution that can be done is the use of probiotics in water maintenance media. The aim of this study was to determine the effect of adding proiotics to media water with different doses on the growth and survival of milkfish (Chanos chanos Forskal), carried out in May to June 2019 at the Gonangkalo Beach Fish Seed Center (BBIP), Gonebalano, Duruka District, Muna Regency. The study used a complete randomized design (CRD) with three probiotics namely A 10 mL treatment per container, 20 mL treatment B per container and 30 mL C treatment per container. Data were analyzed using Variance Analysis (ANOVA) at 95% confidence level (α 0.05). The results showed that the highest daily growth rate was obtained in Treatment B at 5.84±0.16% per day followed by Treatment A at 5.71±0.23% per day and Treatment C at 5.42±0.10% per day. The highest absolute growth of milkfish was obtained in Treatment B at 8.24±0.28 g per individual and the lowest was in Treatment C at 7.95±0.0.33 g per individual, Continuation in Treatment A and B 83.33±5,77%, while in Treatment C 80.00±10.00%. Analysis of variance (α 0.05) showed that the use of probiotics with different doses significantly affected absolute growth (p>0.011) but did not significantly affect the daily growth rate (p<0.063) and survival (p<0.850) of milkfish

Siganus sp is one of the leading commodities that have high economic value. Until now, the market demand for Siganus sp continues to increase so that the prospect of its cultivation is very promising. The problem that arises specifically for fishermen in the coastal sub-district of Maros Regency is that there is no data and knowledge about suitable locations for the cultivation of Siganus sp. This study aims to determine the area that is suitable for cultivation of Siganus sp in the coastal district of Maros Regency. Data collection techniques were carried out by literature studies and direct field observations by taking coordinates and measuring oceanographic parameters (temperature, salinity, pH, brightness, dissolved oxygen, depth, current velocity). Water quality data were analyzed by weighting, overlaying and layout using GIS analysis. This research was conducted in the waters of the coastal sub-district of Maros Regency in January-August 2021. The results showed that the location of the suitability of Siganus sp aquaculture waters in the coastal sub-district of Maros Regency obtained suitable waters (S) for the development of Siganus sp cultivation covering an area of 630.36 ha and waters that are not suitable (N) for the development of cultivation Siganus sp covering an area of 681.2 ha.

Bonylip barb (Osteochilus vittatus) is one of Indonesia's local fish which is starting to bloom in cultivation. One of the important needs in the development of fish farming is feed, to increase feed efficiency by providing probiotics which play a role in increasing growth, survival rates, digestibility, feed efficiency, the immune system and the composition of beneficial bacteria in the digestive tract of fish. This study aims to compare the concentration of different probiotics in commercial feed on the growth and survival of barley nilem (Osteochilus vittatus). The research was conducted at Pandaan Aquaculture Installation (IPB), Pasuruan Regency, East Java. Experimental study using a completely randomized design (CRD) with four treatments and three replications. Statistical analysis to compare growth performance (length and weight) and survival of nilem fish used analysis of variance (ANOVA) test. The results showed that there were differences in the growth of weight, length, and survival of barley nilem (Osteochilus vittatus) on commercial feed with different concentrations of probiotics. Where there is a tendency that the higher the concentration of probiotics in commercial feed, the higher the growth in length and weight and survival of nilem fish (O. vittatus).