MariaBox will develop a wireless marine environment analysis device for monitoring chemical and biological pollutants while installed into a buoy, a maritime means of transport or a mooring. The device, based on novel biosensors, will be of high-sensitivity, portable and capable of repeating measurements over a long time, allowing permanent deployment at sea. The word “MARIA” is the plural of the Latin “mar” (sea) and expresses the wide applicability that this system offers in multiple locations where low-cost and real-time in situ analytical monitoring devices are required. The approach includes: a) a sensing and analysis box, b) a modular communication system, c) a flexible power system, d) a software platform, and e) a cell phone application. The box will transmit the collected data in real time through different channels according to local needs and geographical location: radio, GSM/GPRS/3G, WiFi, WiMAX or satellite link. The unit will be designed to be remotely controlled and will implement the OTA programming and OTA configuration features which will allow the user to update the firmware of the MariaBox unit and modify various configuration parameters wirelessly. Remote updates are a key factor in deployment scalability since it offers the only possibility of easily updating or reprogramming the devices after the initial deployment. Therefore, the maintenance costs are significantly reduced. Biosensors will be developed for 5 man-made chemicals and for 4 categories of microalgae toxins relevant to shell fish and fish farming. The novel biosensors will contribute to new standards for environmental analysis. The analytes selected for the biosensors are in line with 1) the Article 16 of the Water Framework Directive (2000/60/EC), 2) the Decision 2455/2001/EC and 3) The Commission Directive 2009/90/EC. The system developed will be demonstrated and validated in four different scenarios in selected locations in Norway, Spain, Cyprus and Ireland.