The Sustained-Release Oxygen Granule Preparation and Its Application in the Transportation of Live Sea Cucumber Apostichopus Japonicus

This study developed a sustained-release oxygen granule (SOG) to improve the transport of live sea cucumbers. During 8-day storage, SOG provided continuous oxygen while keeping seawater pH stable at 7.10 without affecting salinity. Compared to controls with added air, SOG significantly better preserved sea cucumber quality, delaying tissue autolysis and maintaining superior appearance and texture for up to 7 days. Furthermore, SOG prevented hypoxic stress, as evidenced by stable activities of key enzymes (AKP, ACP, SDH, LDH), supporting the organisms’ immune response throughout the storage period.