My experience with that word comes from when I did a lot of surf fishing.
There is an organization called The American Littoral Society. It's a group dedicated to preservation of the coastline and all the animals, and plants that live along it.
https://www.littoralsociety.org/history.html
They have a program where you can sign up as a volunteer, and they'll send you these spaghetti-like tags to affix to certain fish you may catch. Then you submit to them the info for that tag, like what fish it's on, length, weight, where you caught it and when. If someone ever catches that fish again, you can submit the tag number to them, and they'll share the info they have on that tag, when it was first applied, and every instance of that fish being caught and where.
I never participated as a volunteer applying tags, but I have caught fish that were tagged, and they shared the history of those fish with me. One striper was tagged in South Carolina, and I eventually caught it at Island Beach State Park in NJ.
They're a really cool, hands-on kind of organization.