Deep Look | Beach Day? These 5 Surprising Creatures are Hanging Out Too | Season 12 | Episode 8 | PBS

Do you really know who you’re sharing the beach with? Purple sand dollars gobble bits of metal to stay grounded in turbulent waters. Mole crabs move sand like a conveyor belt. Hardworking bees sculpt tiny sandcastles. Under the moonlight, horseshoe crabs mate by the thousands and bury their eggs. And beach hoppers spend their nights partying and cleaning up while you sleep.