Padilla Bay is so shallow that near Hat Island, the bay is only 12 feet deep. The perfect environment for eel grass, the area is an important ecological feature of the region. Eel grass beds are like nurseries for young marine life including salmon, and crabs. At low tide, the bay becomes a mudflat, full of plenty of crawly creatures, which shore birds and heron make a tasty meal out of.
Washington State Department of Ecology
Washington Trails Association