This week: One daughter’s quest to find the rare butterfly that was her father’s namesake. Plus, view some jellies that aren’t jellyfish, and learn how this photographer captured a bird-of-prey in motion.

COURTESY EFFENDI FAMILY ARCHIVE

Photojournalist and National Geographic Explorer Rena Effendi hardly knew her father when he was alive, but did know this: He was obsessed with butterflies. So when she learned of a little-known species named after her late father, a renowned butterfly expert, she set off in search of it. Here’s how one daughter’s journey to find her father took her through war zones and memories.

More stories:
— Follow the monarch on its dangerous 3,000-mile journey across the continent
— A look at life through my father’s lens

PHOTOGRAPHS BY SAGE ONO

Gelatinous zooplankton, known as jellies, are an evolutionary hodge-podge of squishy, translucent creatures composed mostly of water. Some are what we know traditionally as jellyfish but also include other creatures like the two pictured above. What is the creature on the left? 

A. Pelagic snail
B. Sea salp
B. Hula-skirt siphonophores
D. None of the above 

PHOTOGRAPHS BY ZSÓFIA PÁLYI

For landlocked Hungarians, the “Hungarian Sea” is all summering tourists need. Although this sea isn’t a sea—it’s central Europe’s largest lake, Lake Balaton. Photographer Zsófia Pályi spent her childhood summers at the “sea,” and has returned to take advantage of the lake’s shallowness and shape, both of which lend to photographic tricks and fabulous images.

BEFORE YOU GO: A behind-the-scenes look at how this photographer captured a bird of prey in motion.

Thanks for reading today’s newsletter, which was edited and curated by Jennifer Baik and Melati Maupin. It was produced by Alisher Egamov. Did someone forward this to you? Sign up here to catch next week’s Photo of the Week newsletter.