Henderson is a calm, structured dive with shelves and ravines, and it is loaded with little stories. Expect octopus dens, tube dwelling anemones, feather stars, shrimp, plus lingcod and rockfish cruising the edges. It is a great place to slow down and actually look. Viz during the plankton blooms can be 5 ft, but when it clears in the winter you can expect 100 ft of viz.