It is estimated that more than 200 Rohingya refugees have died or disappeared at sea by 2020 in search of a better life.
The United Nations High Commissioner for Refugees (UNHCR) says more than a third of those who made the dangerous journeys from refugee camps in Bangladesh to Malaysia and Indonesia were children.
Many starved at sea on boats operated by smugglers before being rejected at their final destination due to Covid-19 restrictions.
Rohingya Muslims had already fled their homes in Myanmar to escape persecution, and returning to Bangladesh by sea was complicated, and authorities refused to allow most boats to dock on the mainland.
These are the stories of some who survived.
Reporter: BBC South Asia correspondent Rajini Vaidyanathan. Produced by Peter Emmerson. Animation by Davies Surya. Further filming and production of Omar and Mohammad Faruk.