Short answer: they could simply pop open each oyster.
Honestly, it could be as simple as that. But at the same time, Luca didn't think it would be the smartest thing to do when it would likely result in the death of the oyster.
Now, it wouldn't have been a problem had the Guide not known that there were ways to do it without harming the oysters they didn't intend to use for food. Unfortunately, he was aware that such a method existed, and now he was facing a severe bout of cognitive dissonance.
"Luca, what's the problem?"
The concerned husband finally came over because his little wife's face had suddenly scrunched up. Just seconds ago, Luca had looked almost elated.
"Is something wrong?" Xavier repeated when Luca didn't answer.
"Well…" Luca hesitated. "I'm not sure if it would be right to open them now."
"Huh? Why?"
"Because I just realized I don't really know how to do it properly."
"…Properly?"
