File talk:Hawksbill Sea Turtle (Eretmochelys imbricata).jpg
actually the declared photo of a "hawksbill sea turtle" Eretmochelys imbricata (Ei) is a green sea turtle Chelonia mydas (Cm). They have the same number of Costalia (4) but can easily be distiungished by their number of Praefontalia (Ei=2; Cm=1), the form at the carapax, the form of the scutes of the carapax (Ei=overlapping, outer scutes sharp, Cn=not, form of the beak (Ei=sharp/pointed as they feed on mainly sponges, Cm=really round as they feed on mainly sea grass, algae.
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