When I first noticed the food in the Netherfield dining scene I merely thought how expensive lobster and shrimps would be in the country. Actually I can see Caroline and Louisa elegantly tackling lobster showing off their fashionable table manners while watching in amusement how Miss Jane poked and pried recalcitrant pieces of her lobster. Poor Jane looked discomforted and probably felt such a butter fingers. It would amuse people like the Bingley sisters to see how Jane could cope with such a fine table setting. Erst while adding to her difficuties by asking her questions about her family they would note her table manners, did she eat jelly with a fork or a spoon? Did she begin on second course dishes too early? If they really wanted Miss Jane to feel comfortable surely they would serve a dish she was used to like lamb or a game dish? So I think your point of 'interrogation under seafood' very apt. Till now, I've never thought about AD's arrangements of that dining scene.