Crossword clue: a sea turtle (eretmochelys imbricata), which yields the best quality of tortoise shell; -- called also caret.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
pugnacious tropical sea turtle with a hawk-like beak; source of food and the best tortoiseshell