These Pacific sea nettles floating in a 740 gallon tank are mesmerizing to watch. It seems their bell-shaped bodies illuminate colors while their long tentacles, which can reach ten feet, dance and sway in the water. Their scientific name is chrysaora fluscescens. They can be found along the Pacific coast from Mexico to Canada and also at the Aquarium of the Bay. They have three large exhibit areas that showcase over 20,000 marine animals from the San Francisco Bay.