Vannamei shrimp (Litopenaeus vannamei) is an important food commodity of economic benefit due to its high price, low susceptibility to disease, and popularity for consumption. These advantages have led many farmers to cultivate vannamei shrimp. Efforts are underway to improve the aquaculture performance of this species, including the use of probiotics, which are non-pathogenic bacteria that aid in digestion and help fight disease. Probiotics are usually obtained from the intestines of vannamei shrimp or the culture environment. They are low-cost, non-pathogenic, and largely non-toxic source of antibiotics and are able to synthesize various metabolites that have antibacterial functions and applications. Research on probiotic use has primarily been focused on increasing vannamei shrimp aquaculture production. Bacterial species, such as Lactobacillus or Nitrobacter, can be administered orally, by injection, or as a supplement in aquaculture water. Probiotics help to improve survival rate, water quality, immunity, and disease resistance through space competition with disease-causing bacteria, such as Vibrio spp. An increased number of probiotic bacteria suppresses the growth and presence of pathogenic bacteria, which lowers disease susceptibility. In addition, probiotic bacteria also aid digestion by breaking down complex compounds into simpler substances that the body can absorb more easily. This mechanism improves growth performance in terms of weight, length, and feed conversion ratio. This review aimed to provide information regarding contribution of probiotic to improve vannamei shrimp production in aquaculture. Keywords: application, bacteria, farm, microbiome, shrimp.

Kiluan Bay is a coastal region in Tanggamus Regency, Lampung Province, with a very high potential for tourism. Increased levels of tourists may have a negative impact on Kiluan Bay's natural resources, one of which is the accumulation of trash. The ecosystem at Kiluan Bay may be impacted by trash accumulation, especially plastics. If these issues are not properly handled, it will have an impact on the sustainability of tourism activities and the preservation of the environment. Even so, this will have an effect on the local economy. In order to reduce the negative impacts of tourism activities that are not environmentally friendly, it is thought that the concept of ecotourism needs to be implemented at Kiluan Bay. The purpose of this study is to establish ecotourism development strategies that emphasize community knowledge at the local level. Survey techniques and interviews with relevant persons were used to collect the data. The results of the data collection were analyzed using a SWOT analysis to determine the alternative strategies required to support the implementation of the ecotourism concept in Kiluan Bay. The research showed that Kiluan Bay's ecotourism development is positioned in quadrant V (Growth/Stable). This viewpoint suggests that the ecotourism development strategy in Kiluan Bay, Lampung, must take the most of the existing opportunities. Developing an ecotourism management approach in Kiluan Bay that involves the community directly is one strategy that had to be implemented.