Ms. Ambrosino’s research focuses on the electrosensory system of elasmobranchs, particularly that of the scalloped hammerhead shark (Sphyrna lewini). Sharks use specialized sensory structures called ampullae of Lorenzini to detect electric fields from potential prey or mates and possibly to navigate the Earth’s field lines. The ampullae sit under the skin and are connected to pores on the skin via gel-filled canals. As a shark swims through an electric field (produced by the muscles of a hiding fish, for example), the receptor cells of the ampullae are able to detect weak voltage gradients, thus leading the shark to its dinner. To learn more, simply show up at Hanauma Bay Thursday evening.