The deadliest, most dangerous creature to humans: the mosquito. Mosquito-borne illness kills over 720,000 people a year. And factors like climate change and rising population mean more affected areas. To combat this threat, research is ongoing worldwide. By examining the survival strategies of our greatest enemy, science may uncover secrets that could benefit us all. In J-innovators, we meet the developer of a DHA-rich microalgae that could make our use of the world's oceans more sustainable.