The tide has been very low lately, exposing the rocky bottom of the sea near the coastline.
The bare coral and rock reminds me a bit of photos I've seen of the Bay of Fundy at low tide. I know that tides are generally lower in the spring. Or at least, that was the case in Florida.
Shelling is best in late March and early April because of the low tides. I have a feeling that the recent perigee-syzygy moon is making for unusually low tides right now, though, even for spring.
The drastic difference can be noted in the following pictures, taken from roughly the same spot and around the same time of day, although the angles are a little different. The first was taken on the 14th of February
While this was taken on the 25th of March: