600 commitments from countries, businesses and civil society groups have so far been received, that target issues ranging from protecting coral reefs, strengthening sustainable fisheries, reducing plastic pollution, and addressing the impact of climate change.
Fiji's president of the UN general assembly Peter Thompson says the conference will begin the process of reversing the cycle of oceanic decline by producing practical solutions.
The Conference will result in a Call for Action that will be formally adopted at its conclusion on Friday.