Adam,
What an engaging thread! I don't know if you are book dork like I am; if you are you might consider the following books by
Alan Davidson. (This link is to his obituary in
The Guardian. It is the most thorough link I found on him).
Mediterranean Seafood (1972)
Seafood of South East Asia (1979)
North Atlantic Seafood (1979)
Saveur magazine's website says of
Mediterranean Seafood: "Complete handbook to Mediterranean sea life, with black-and-white drawings, detailed definitions, translations, and recipes. Excellent for identifying the lesser-known creatures." His works are considered unimpeachably authoritative. Davidson was an Oxford graduate and was serving as a British diplomat when he wrote
Mediterranean Seafood.
Elizabeth David, goddess of English food writing and
M.F.K. Fisher's spiritual twin, gave Davidson his publishing break by recommending his manuscript to Penguin.
Davidson wrote many other books, including the previously out-of-print
Fish and Fish Dishes of Laos, and was the editor of
The Oxford Companion to Food, of which Amazon.com says: "Davidson himself...contributes approximately 80 percent of the 2,650 entries, thereby guaranteeing high levels of erudition, readability, and deadpan feline wit."
You could buy his books through
www.abebooks.com (direct link to his books with the word "seafood" in the title), which is a site that is linked to the inventories of thousands of used-book stores.