Bug with Alberto's remains quest?

[monkeefriend]

i too believe this quest must be bugged! argggg, me and me mates shot hundreds of ROCK crabs, sand and Giants to no avail pirates! Ive shot em on Driftwood Isle, Devils Anvil and Isle la Congreros (sic)? and NONE of em recognize the quest by alerting the Not found or Found pearl prompt. Ive tried re-booting my pc to return to the game same problem. I met another mate on the island trying to get entrails from a Giant Crab and same problem for him. ..are all the crabs bugged?

plunder on mates, Grace Squidkidd