Loggerhead sea turtles are primarily carnivorous, but will also eat algae - Ascophyllum, Ulothrix, Urospora, Sargassum - and vascular plants - Cymodocea, Thalassia, Zostera - making them omnivorous. Their huge heads and massive, powerful jaws make them well-adapted to eating hard-shelled prey, such as horseshoe crabs (Limulus polyphemus), bivalves, barnacles, whelks, and conchs. However, Caretta caretta is a dietary generalist and also eats many other invertebrates, such as sponges, jellyfish, cephalopods, shrimp, insects, sea urchins, and fish and fish eggs, including Brecoortia species, Ceratoscopelus species, and Diodon species. There are slight variations in the diet of each life stage, but loggerhead sea turtles are generalists throughout life.
Animal Foods: fish; eggs; insects; mollusks; aquatic or marine worms; aquatic crustaceans; echinoderms; cnidarians; other marine invertebrates
Plant Foods: leaves; algae; macroalgae
Primary Diet: omnivore
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