Marine biologist Dr. Steven Haddock joins the show to share the alien, glowing, and transparent wonders of the deep ocean. We discuss his beautiful new book, The Radiant Sea, and explore the complex engineering and high-sensitivity optics required to capture living deep-sea creatures. Steve walks us through the evolutionary logic of biological light, how vantablack organisms trap photons in the dark, the horizontal sun-compass navigation of jellyfish blooms, and what it's like to play games underwater with giant Pacific octopuses and jumbo squids.

Dr. Steven Haddock is a Senior Scientist at the Monterey Bay Aquarium Research Institute (MBARI) and an adjunct professor at UC Santa Cruz.

Some related MBARI Videos

• Bioluminescence in the deep sea: How and why do animals create their own light? Steven Haddock explains the diverse and striking functions of light emission in the ocean's twilight zone. (So many pretty pictures!)

• Mysteries of the Deep with Dr. Steve Haddock — Bioluminescence! Long-form lecture on the physics and evolutionary biology of bioluminescence.

• Live Blackwater Diving Q&A with MBARI and Aquarium Scientists! | Into The Deep Q&A with scientists about diving in the middle of the ocean at night.

• Rarely Encountered Seven-Arm Octopus in Monterey Bay: Footage captured by Steve Haddock and MBARI's Biooptics team shows an octopus with a jelly snack.

Discussion Resources & Links

Steve's Books:

• The Radiant Sea: Color and Light in the Underwater World by Steven Haddock and Sönke Johnsen

• Practical Computing for Biologists by Steven Haddock and Casey Dunn

Scientific & Marine Mentions:

• Steven Haddock's Wikipedia Page

• Steven's MBARI home page. His lab is the Biodiversity and Biooptics Lab

• Electric Disco Clams Exist—Watch Them Light Up This Coral Reef | National Geographic

Why is she like this?

• Disco Snails (Official Video) - Music

More neat creature videos

• Jelly-like Siphonophores Astound with Breathtaking Beauty: A close-up collection of the incredibly complex, colonial siphonophores that Steve mentioned, showing off their bizarre structures and flowing shapes in the pitch black.

• How the Disco Clam Uses Light to Fight Super-Strong Predators: See the "electric" flashing effects inside the disco clam's mantle up close, alongside an explanation of how their silica spheres scatter ambient light to startle predators.

• Absurd Creatures: Comb Jellies Are Ready to Rave – A fun, fast-paced video exploring the "Skittles" rainbow iridescence caused by the moving rows of cilia on ctenophores under white submersible lights.

Transcript