California Gray Whale (Eschrichtius robustus) calf vertabrae on Isla Tiburon in the Gulf of California (Sea of Cortez), Mexico.

california gray whale eschrichtius robustus grey baleen ballena gris mysticete mammal warm blooded bottom feeder san ignacio lagoon baja mexico cetacea cetacean odontocete porpoise balaenopteridae odontoceti cetaceans remains mexican central america central american tropic tropics tropical shore beach coast coastal sand northern hemisphere skeletal skeleton bones