A citizen science project which allows local divers photo document encounters with Sevengill sharks (Notorynchus cepedianus). The Sevengill Shark Sightings is a portal through which data is entered into the 'Wildbook' pattern recognition algorithm program. Report sightings here: https://www.sharkbook.ai/ Two pattern recognition algorithms are used to analyze the freckling patterns of each shark to determine which animals are returning each year. Sevengill Shark Zero Data Project: Didn’t see any Sevengill sharks on your dive today? No problem –– we still need your data! ‘Zero data’ is an important concept in long-term population studies in a fixed location with a single species: it’s also called ‘Presence/Absence’ data, meaning, we still want to know when you did *not* see a certain species in a given location, because it tells us a lot about why that particular species may or may not be present at certain times of the year. And, it goes without saying, of course, if you *did* see some sevengill sharks, we certainly accept your photographs!