International Journal of Marine Science, 2025, Vol.15, No.6, 320-328 http://www.aquapublisher.com/index.php/ijms 325 change. Fortunately, such changes are often reversible. As long as the aquaculture facilities are dismantled, the hydrodynamic system can gradually return to its original state (Zamora et al., 2018). So, don't expect that just one test can tell whether the sediment condition is good or not. This thing needs to be closely watched, monitored according to the time nodes, and then the management methods should be slightly adjusted in combination with the current breeding conditions. Only in this way can it truly be both stable and environmentally friendly. 6.2 Ecological restoration effects of sea ranching practices in Papua New Guinea Releasing the larvae of Holothuria scabra into seagrass beds is not always as smooth as expected. In the experiments in Papua New Guinea, the survival rate and growth performance of some locations were good, but in some areas, there was almost no harvest and all the individuals were wiped out (Figure 2). There are also many influencing factors, including the quality of seagrass beds, local hydrological conditions and even human disturbances (Hair et al., 2016). This makes the importance of site selection stand out all at once, and the participation and management of the community also become particularly crucial. The technology itself is not a problem. However, in actual operation, situations such as illegal fishing, inadequate monitoring and weak governance occur from time to time, which directly limits the long-term benefits of the project (Hair et al., 2020). However, if good locations are selected and local management is implemented, the release of sea cucumbers can in turn promote the growth of seagrass and facilitate ecological restoration (Arnull et al., 2021). Nevertheless, this effect is not a one-time solution but requires continuous maintenance. Figure 2 Location of Tampolove within the Bay of Assassins in southwest Madagascar (Adopted from Arnull et al., 2021) 6.3 Environmental monitoring data from IMTA practices in the South China Sea The integrated aquaculture (IMTA) model in the South China Sea was actually once highly regarded by many people, especially the type where fish and shellfish are raised together in the sea. Judging from the monitoring data, it is indeed effective, mainly in reducing suspended particles and improving the quality of sediment (Zamora et al., 2018).
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