A team from the MIO has isolated a strain of marine and diazotrophic Spirulina in New Caledonia, i.e. capable of growing without nitrogen fertilisers thanks to a nitrogenase. This strain, which can be cultivated in a marine environment, develops preferentially in biofilm. Preliminary tests carried out by the MIO have demonstrated the potential of the approach on the LOV pilot systems. Other tests have demonstrated its capacity to release forms of dissolved nitrogen that can be used by other microalgae. The aim of the project is to gain a better understanding of the physiology of this species, with the aim of domesticating it, improving it and producing it on a pilot scale, by adapting the Inalve process. The aim is to produce it alone or in symbiosis with other microalgae, providing them with a fraction of the nitrogen they need.