The Laboratoire d’Océanographie de Villefranche (LOV) developed the EcoTaxa application to host and curate large plankton image datasets. The FOTONOWER company has experience with image segmentation and classification using machine learning. The two joined forces to improve the machine learning aspect of the EcoTaxa application. The project has two objectives: (1) improve the accuracy of the classifier, (2) implement visual similarity search within millions of images.