Why did my poached egg sink?
I cooked thousands of poached eggs during my culinary career, and have never seen one float. And it really does not need to anyway. What is the point? If you want to keep all the whites together, try adding a tsp of so of vinegar and using the freshest eggs you can buy. To keep them from sticking to the bottom of the pas, I use a rubber spatula and lift them off the bottom after a minute of cooking. As with all egg cooking, keep the temperature low. For poached eggs this means just a few tiny bubbles in the water.