Welcome to Photo of the Week. Today, see the microscopic universe that lives in a single drop of water. Plus, we have exclusive photos of the world’s largest coral and some teeny-tiny (true) crime scenes.

PHOTOGRAPH BY ANGEL FITOR

Do you know what’s in a drop of seawater? Scientists estimate that some drops may contain as many as a million organisms, most too small to see with the naked eye. For the past several years, Spanish photographer Angel Fitor has been collecting water from the Mediterranean and photographing the minute critters within it.

While these tiny creatures and their water worlds are often overlooked, Fitor likens each sample to opening presents on Christmas morning when he was a child. “You never know what is in a sample until you place it under the lens,” he says, “It feels like a genuine discovery.” 

More images in the micro:
— These ant 'portraits' reveal how diverse and beautiful these insects are  — This is what plants look like—from the inside out  

PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC, PHOTO ARK; PHOTOGRAPHED AT SAINT LOUIS ZOO 

What has fiery red spots, orange-tipped antennae, and holds the key to developing the next generation of antibiotic treatments for humans? The beetle pictured above. But what species of beetle is it?

A. Japanese beetle
B. American burying beetle
C. Atlas beetle
D. Elephant beetle

PHOTOGRAPH BY MANU SAN FÉLIX, NATIONAL GEOGRAPHIC PRISTINE SEAS 

WORLD’S LARGEST CORAL: From the surface, it looked like a long-forgotten shipwreck. But when cinematographer Manu San Félix dove down to take a closer look, he was amazed to find a coral so big, it can actually be seen from space. See the exclusive photos of the 300-year-old coral, discovered by the National Geographic Society’s Pristine Seas expedition team.

BEFORE YOU GO: Peek into this miniature (true) crime scene built by an obsessed millionaire.

Thanks for reading today’s newsletter, which was edited and curated by Jennifer Baik and produced by Amanda Williams-Bryant. Did someone forward this to you? Sign up here to catch next week’s Photo of the Week newsletter.