UNSTOPPABLE FISH spooled my Daiwa BG 4000 Reel!!!! WTF was it??? Do you know?

Help me figure this out, i had to tighten my 17.6 lbs drag 3 times but there was no stopping this fish! What could it be???

[@michaelyunnn]

ray.

[@KenshiroRyuFishingDojo]

Could be i hooked a 70 to 80 lbs butterfly stinyray here before on a 3000 size reel and it didn't go that hard or fast than this monster. I even landed that stingray onto the bottom rocks after 20 mins.

[@Skaptain91]

spinner shark probably

[@KenshiroRyuFishingDojo]

I wish i wasnt such a weak ass that day and used my bg 5000 that has 400 yards of 50 lbs line instead 😅

[@stanleyh5706]

Shark