Never mind Polar Bears and Puffins as markers for Catastrophic Anthropogenic Global Warming, use Florida instead. Florida was completely under water up to 30 million years ago, when enough ice started accumulating on land masses and sea level went down enough to establish terrestrial animals (first fossil around Gainsville in Oligocene). Then our planet enters an Ice Age, around 5 million years ago, and sea level goes up and down 120 to 160 meters, during inter or intra glacial phases. During a recent drive down to Key West (that should be on everyone’s bucket list, and be sure to eat at Hog Fish restaurant) I saw coral reef and re-worked, by Hurricanes, coral reef material. The highest land along the Keys is currently 18 feet. So, if you add another 10 feet, at least, for the sea level above that reef material, recent sea level along the Keys was 28 feet higher. Global Warming sea level rise? Call me when it goes up 28 feet, until then no anomaly signal, and no basis for CAGW theories.