OTZ Returns to Sea

Climb aboard an unprecedented four-ship expedition—the largest and most comprehensive effort ever to study the ocean twilight zone.

Siphonophore tentacles

OTZ Project Endorsed by the UN

We're now an officially endorsed project of the U.N. Decade for Ocean Science. So... what does that mean, exactly?

Spotlight: Heidi Sosik

Are microscopic plankton the key to life in the twilight zone? OTZ biologist Heidi Sosik explains.

The Twilight Zone and Climate

A new report from the OTZ team shows just how critical the zone is to global climate.

What can eDNA teach us about vertical migration?

Scientists are learning volumes about the twilight zone from a few samples of seawater.

angler fish

Creature Feature: Anglerfish

When it comes to deep-sea weirdness, the Anglerfish takes the crown. Learn why.

Exploring to understand.
Informing to sustain.

History is rife with examples of how humans have squandered natural wealth like that contained in our ocean’s twilight zone. Our project combines exploration and research with policy and broad engagement so that we can make informed, thoughtful choices about our ocean, framed by equitable and sustainable use of this shared resource.

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