“DON’T YOU KNOW that fish pee in the ocean?” is no longer the worst excuse you can have for avoiding a trip to the beach. The ocean (and any body of water, really) is crawling with microorganisms invisible to the naked eye — unless looked at through a telescope, that is.

Photographer David Littschwager took this photo of of seawater, magnified 25 times under a microscope. His photograph shows how much life is contained in a single drop of water from the ocean, from crab larvae, to worms, and loads of bacteria. Maybe some of it is from fish pee, but I bet there are nastier things we don’t even know about floating around our bathtubs.

Read more about it here.