Trinidad and Tobago's First Locally-Led Deep-Sea Expedition Finds 25 Cold Seeps and 20 Suspected New Species

In July 2026, marine scientists from Trinidad and Tobago conducted the country’s first locally led deep-sea survey, discovering 25 cold seep ecosystems and 20 suspected new species and mapping 13% of the nation’s uncharted seafloor. The expedition, operated from a Schmidt Ocean Institute research vessel, represents a decisive shift in who gets to define the scientific narrative for a Caribbean nation whose economic history has been shaped by offshore hydrocarbon exploration.

The findings center on the discovery of more than 25 active cold seeps, seabed sites where methane and hydrogen sulfide-rich fluids seep from the subsurface, supporting chemosynthetic ecosystems independent of sunlight. These environments are known to host unique, often endemic communities of organisms, and the expedition’s tally of 20 suspected new species suggests the biological richness off Trinidad and Tobago’s coast has been dramatically understated.

Beyond the biological catalog, the mission’s mapping work proved equally consequential. The team mapped 13% of the country’s marine territory, a substantial portion of what had previously been documented as blank space on oceanographic charts. For a nation where the deep sea has historically been the domain of foreign oil and gas surveys, this newly charted territory now belongs to a different kind of ledger.

The expedition’s significance lies as much in its leadership as in its discoveries. Where past deep-sea work in the region was typically led and published by institutions from North America or Europe, this survey was conceived and executed by Trinidad and Tobago’s own scientific community. The data sovereignty that comes with that shift is non-trivial; the baseline maps, species records, and ecosystem models generated are now held by the national agencies and universities that will use them for conservation and management.

Cold seeps themselves sit at a complex intersection of interests. They are sites of intense biological novelty and potential bioprospecting value, but in a region like the southern Caribbean, they are also frequently co-located with oil and gas reservoirs. The same geological faults that allow hydrocarbons to migrate to economic traps can also vent them into the water column at seeps, making these ecosystems both scientifically priceless and industrially adjacent.

For Trinidad and Tobago, a country whose economy has long been tied to fossil fuel extraction, the expedition creates a new set of reference points. The 25 seeps and their associated communities are now part of the national patrimony in a way that a foreign-led survey’s findings might not have been. The task that follows—integrating this new knowledge into marine spatial planning, potentially alongside existing and future industrial activity—is a domestic policy challenge, not an imported one.

The July survey did not happen in a vacuum. It was enabled by the Schmidt Ocean Institute’s long-standing practice of granting research vessel time to scientific teams through a competitive process, a model that deliberately transfers operational control to the grantees. The result here was a mission that looked like the country it was surveying: led from the front by local experts who no longer need to wait for an outside institution to decide their deep sea is worth examining.

Sources

• Trinidad and Tobago Scientists Lead First Deep-Sea Expedition Revealing 20 Suspected New Species — Eco Magazine
• Caribbean-Led Expedition Explores Deep Sea Offshore Trinidad and Tobago — Ocean Economist