I see we have a scuba diving and a snorkeling tag. Do we group free diving / apnea diving under snorkeling, or do we create its own tag? What about spear fishing? Does it fall under free diving or a tag on its own? Is competitive spearfishing & competitive Apnea diving on topic?
The only way to create a tag is to put it on a question, and a tag not on any question will be deleted in about 24 hours. So when a free diving, apnea diving, or spear fishing question comes along, it should be tagged with the relevant tag, but we don't need to (and can't) do anything before then.
I do think competitive spearfishing and apnea diving are fine.