I've added a Data Form on the left-hand side of the Sevengill Sightings Website, here:
If you have an encounter with a Sevengill shark, simply answer the easy 'Q&A' here about your encounter and you'll be good to go. Thanks!
PS: Instructions are also provided on how to enter your encounter in the Reef.org database as well. I encourage you to to that also, if you have time.
Any questions, just let me know,