The Shark Immune System

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a man with glasses and a beard is talking about sharks and their immune systems
    a shark is shown in a national geographic ad
    a group of sharks are swimming in the ocean with a national geographic logo on the bottom
    three dolphins are swimming in the ocean with the national geographic logo on the bottom
    a dolphin is swimming in the ocean with the national geographic logo in the background
    a man is looking through a microscope with a national geographic logo on the bottom right
    a shark is swimming in the ocean with a national geographic logo on the bottom
    a shark is swimming in the ocean with a national geographic logo on the bottom
    a barry gifs are back animated gif
    two dolphins are swimming in the ocean with a national geographic logo behind them
    a man is looking at something under a microscope with the words looking for my breakfast at the expo
    a television screen shows a news report about a man who has a diamond in his mouth .
    a screenshot of a video game that says empty slot at the bottom