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Oceanographic states are closely related to marine biota’s distribution and breeding patterns, especially in the intertidal zone. This study analyses the water quality variability and their relationship in the water of Prigi Bay. Water quality data was collected in situ using a Water Quality Checker. The statistical analyses were performed by applying PAST software version 4.11. The suitable waters with the best tendency value for the placement of lobster artificial reefs are stations 2 (Karang Gongso) and 4 (Damas). It is not only explained by salinity and turbidity but also by the ORP role, which has the solution potential to transfer electrons from oxidants to reductants, thus affecting the chemical processes. The high potential suitability at 2 locations is due to the concentration of a supportive environment with variability in ORP concentrations, having more potential for electron transfer, which significantly affects the attached benthic life as a pioneer for the reef. Salinity stability is safer from the impact of water mixing from the estuary. Parameter concentrations are more stable according to water temperature standards for coralline algae growth and are affected by turbidity and dissolved oxygen. In addition, other research is needed, such as social factors and fishermen’s activities.

This survey is part of the installation of Tripod Jackets in Makassar Bay, targeting the North Side, North Nubi and Jumelai, PT Pertamina Hulu Mahakam in East Kalimantan waters. This study aims to provide marine mammal observation to the JSN project. Expert help is essential because it complies with the International Maritime Organization MEPC.1/circ.833 rules. From 13th April to 2nd June 2021, observations were made using visual and passive acoustic methods (SQ26: H1 recorder). The visual observation focus was from 500 meters to 1000 meters. The team found that the dolphins that appeared were bottlenose, long-beaked, and dolphins were not identified. The highest prevalence was during the pilling of 12 dolphins at JML 1 site (after the GTS installation and adjustment). Long-beaked and unidentified dolphins were found in WPN 4 location. The dolphins seen were Tursiops species, while the turtles seen were green turtles. When watching dolphins, sightings occurred mainly at night. In the next task, the collection process, we want to discuss the process that produces a high sound on the water’s surface. We recommend using “early warning”. The warning will be done after the routine inventory, and we hope the staff can do it three times.