There could be some group of native people who have been occasionally finding two-inch-wide grubs for thousands of years and think they got really lucky and they just cook it on a stick over a fire. Maybe no one has thought to ask the right person what the biggest grub they've found was.
Two species of extant coelacanth have been discovered at fish markets, one in 1938, the other in 1997.
It reminds me of the bread they found at Pompeii, which were pull apart and shaped with string. OP's looks tastier though since it's fresher and not burned.
Gecko99 OP t1_jcx7izz wrote
Reply to comment by flaminate_strutching in TIL no one has found a larva of the titan beetle, one of the largest beetles in the world. by Gecko99
I was going to put that in the title but the automoderator wouldn't let me include speculation.