Hi Squidd, Let's see..without looking at my little nerdy saltwater journal, I'd guess that the tang was about 3 inches when I put the approximately 3 inch lion in. Definitely guessing that maybe they were put in a month or so apart... Also, they were put in a 55 gallon together. Of course, in hindsight, that was a mistake. As for when the attack occurred..again guessing...the lion grew about 5 inches...could it have grown that much in 6 months? If so, thats my approximation. I think I answered all your qs. If not, ask away. Hope I helped. Let us know when you get all your data together. My situation was definitely pushing it because of the size of the tank, but even in "the conscientious marine aquarist", it says that sooner or later a trigger will make a pull-toy out of a lion.
Take Care.
Debbie G