As another aside, I used to dive for Abalone here off the Kaliphoney coast back in the day, and yes we were only allowed to snorkel after them too, but they are protected now as they are a favorite food of the also protected, and seriously booming sea otter population. Even if you could still go after them, good luck ever finding one on a single breath, as those greedy little otters have just about wiped them out now for sure.
As for eating Abs ... I did enjoy them, but don't think they were anything like the end all / be all of sea food in any way. Tough as shoe leather unless you pounded the holy hell out of them with a waffle faced mallet, I'd generally dip them in a little lemon juice, Teriyaki sauce and Hoisin sauce, before rolling them in cornmeal, and baking or pan frying. Damn good, but not to die for .... speaking of which ....
Last time I went after Abalone, they were already getting real scarce. Went up to dive off the Mendocino coast which was a very rugged coastline and very cold water. There was a goodly surge running, and after about an hour of moving around I found a long narrow crack between two huge rock faces. I let the surge carry me in and out of that crack half a dozen times checking out both walls for abs, slowly getting deeper and deeper with each breath. I came upon one of the biggest red abs I'd ever seen about as far in as the surge could take me, down near the bottom of the crack. Went back up for one last breath and bee-lined for that ab .... and just as the surge brought me even with it and I was carefully guiding my ab iron toward the edge of its shell, because I knew I'd only have the one shot at this big guy, I found myself staring at a face mask full of Moray Eel teeth, as one seemed to be living in the crevice just above the ab, and took aggressive offence at my proximity. It was all I could do to not try and take a huge breath, which would have been pure seawater of course, and retain my composure enough to get the heck out of there. Fortunately, because I was only in the crack that far due to the surge, and only at a pause for an instant, the surge took me right back out of that crack .... and I didn't bother trying to go back in again! That was the only ab I saw that whole trip, and that was the last time I went out for abalone. Yep, that eel did scare me some, but the reason I quit diving for abs, was there were no longer any abs to dive for!