Fishing for data! Collaborative integration of sensors with fishing can fill some of the most pressing gaps in our sustained ocean monitoring. Fishing vessels operate exactly where autonomous platforms cannot, leading to a surprising lack of data close to shore compared with the open ocean. We enable cost-effective collection of ocean data, by equipping fishing gears with sensors. Profiles of temperature, salinity, and other essential ocean variables are measured, sent to the vessel, and then onto users in real time. Today a shortage of these data types holds back advances in dynamic ecosystem-based fisheries management, virtually every branch of oceanography, climate change monitoring, and many advances for the blue economy.