Author: Graham Thompson
Source: Greenpeace UK

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Imagine an ocean so unique that instead of land borders, it’s defined by floating gardens of seaweed and the melodies of whales. Welcome to the Sargasso Sea, a mysterious underwater neighborhood recently visited by the Greenpeace ship Arctic Sunrise and a British pop star with a passion for the ocean.

The DNA Whisperers of the Sea

In May 2024, scientists onboard collected tiny traces of DNA—think of it as oceanic detective work—from seawater. This cutting-edge method, called eDNA analysis, is like having a magic lens to spot creatures too shy or elusive for the human eye. The result? Around 40 marine vertebrate species revealed themselves, from airy flying fish to the deep dark lanternfish.

Among the loudest whispers in the genetic data were some star residents: vulnerable sperm whales, notably the elusive pygmy sperm whales, dolphins, and even the South American sea lion (which might be a case of mistaken identity or an unexpected visitor). These creatures are the VIPs (Very Important Patrons) of the Sargasso, contributing to a rich and fragile ecosystem.

Sounds Beneath the Waves

But that’s not all. Using hydrophones—imagine super-sensitive underwater microphones—the team caught the sonic chatter of these marine mammals. Two pods of sperm whales were recorded, their deep clicks reminding us that they are vulnerable travelers of the open ocean, relying on vast, protected spaces like the Sargasso Sea.

Why Care About This Floating Seaweed Oasis?

– The Sargasso Sea is critical for species like American and European eels, embarking on legendary spawning journeys.
– It’s a nursery and haven for animals found nowhere else, from tiny shrimp to flying fish.
– The area faces threats from industrial fishing and shipping, casting a shadow over its future.

Bermuda’s own voices, like Noelle Young, emphasize how intertwined their culture and economy are with the health of these waters. Protecting the sea means protecting people, too.

A Call to Action: Ocean Sanctuary or Bust

Greenpeace and its allies are urging the UK government and others to declare the Sargasso Sea an ocean sanctuary under the upcoming Global Ocean Treaty. Think of it as turning the high seas into a national park—only underwater, and massively important.

As Bastille’s Dan Smith (yes, the musician!) noted, the ocean’s ecosystems can rebound if given a chance. His song “Blue Sky & the Painter” sang hope into the airwaves – a gentle reminder that preservation is a team effort, sides united by a shared love of our blue planet.

So next time you hear a whale’s song or gaze at a serving of fish on your plate, remember the Sargasso Sea—a shimmering sanctuary waiting for its moment to be protected.

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