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Photo taken on Feb. 3, 2020 shows the newly-born thornback ray "Srecko" (Happy) in an aquarium in Pula, Croatia. (Dusko Marusic/Pixsell via Xinhua)
Photo taken on Feb. 3, 2020 shows the newly-born thornback ray "Srecko" (Happy) in an aquarium in Pula, Croatia. (Dusko Marusic/Pixsell via Xinhua)