Thursday, Oct. 5, 2023 at 7 p.m. on KPBS 2 / Steam now with the PBS App. From the smallest sea shell to the immense whale shark, award-winning international wildlife photographer and filmmaker Todd Gustafson introduces viewers to the creatures that inhabit the sand flats, tidepools, lagoons and ocean depths. He also shares photographic techniques and some of the physical practicalities of taking a camera underwater.