I read the article looking for one thing. Them mentioning the potential for false sense of security. I was very pleased and Happy they mentioned it. As it was

I read the article looking for one thing. Them mentioning the potential for false sense of security. I was very pleased and Happy they mentioned it. As it was my first thought. After reading what they were doing. I may have overlooked it but did they mention any estimates about how many sharks there are in that area? Even if a wild guess? To reflect are there only 300 of 10,000 sharks tagged or 100,000?