References? And of course, that is by value... I’m in NZ and it’s been in the news about how our our crayfish (lobster in US) exports to China crashed, but that’s a high value food. China imports a lot of “unnecessary” luxury foods from NZ (deer, fruit, salmon, mussels, etc), although I don’t know anything about volumes of staples like wheat.
I have only heard of kiwifruit going unharvested. We’ll all soon know (if product has no coolstores, and assuming farm to supermarket delay is about a week).
Crayfish is crawfish in the US, not lobster
Edit: the dictionary says langoustine are another species, although one of the joys of English is making it mean what you want!
There are some giant crayfishes in Australia. Much bigger than the standard old world crayfishes. Some (Cherax) can be raised in captivity and are very similar to lobsters in size and color, except that they are non marine.
Closing sea ports should not to be a problem for those species at short term (as long as there are reserves of crayfish food remaining of course).