EveryFish-COCO format specifications. Version 1.0

These documents describe the format developed for the annotation and storage of image data targeted for fish detection during the EVERYFISH (https://doi.org/10.3030/101059892) project. It is based, expands, and preserves full compatibility with the COCO (Common Objects in COntext) format, using the same attribute names defined in COCO, and provides additional information about fisheries-related attributes to capture domain relevant information required for fisheries monitoring. This format can also record detailed information for each individual fish, including fish length, weight, and occlusion type. To further support interoperability, a series of controlled vocabularies and standard formats are assigned to most of the attributes. “EVERYFISH-COCO format specifications – v1.0.pdf” is the master document that describes the EVERYFISH-COCO format and file structure. “FAO-Alpha3.csv” and “RECO.csv” are ancillary files that contain December 2025 frozen copies of, respectively, FAO Alpha3 codes for fish and seafood types, and ICES RECO fisheries codes. Links to these codes are can be found in the master document. Here they are provided in separate files due to their length.