SD Bay, what wish have super sharp teeth, was swawed off today

[Irishman]

Launched at 11, wind got ridiculous so I kept it from shelter island beach to out to where they pen the dolphins and seals, basically zigzagged with the wind, drag nicely portioned pieces of squid for about 250 yards and then paddled back south to the jetty and repeat, did this for about 4 hours and two sculpin type fish which I threw back. I was working the classic halibut rig, two swivels, 25lb fluoro. On what was my last drift from about 100 yards off the fishing pier I had a very nice hook set. Clicker rang zzzzz,zzzz,zzzz and I turned around and counted to 5, still a high speed zzzzzz. I set the hook, very brief engagement which felt very solid and then ping....sawed off. Want came up has me puzzled as I was just left with the top swivel and about 14 inches of line. I have attached a diagram. Are the mud marlin in sad bay capable of inhaling leader of 18 plus inches , basically inhaling and biting off above where the sliding swivel would be? It was such a nice sound to hear after the wind kicked my ass all day