Ocean Health Index

open-source scientific tools and resources

What is the OHI?

The Ocean Health Index ('OHI') is a way to measure how healthy oceans are. Understanding the state of our oceans is a first step towards ensuring they can continue providing humans benefits now and in the future.

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OHI Flower plot

What is OHI+?

Independent assessments at any scale.

OHI+ assessments use the OHI framework and are independently-led by anyone interested. OHI+ assessments are often conducted at smaller spatial scales with the purpose of informing marine policy.

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Where have assessments been done?

Assessments at the global scale have been completed from 2012-2015. Assessments have also been completed or are underway at smaller scales within coastal countries or groups of countries around the world.

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How do I get started?

We provide free instruction and software so you can conduct your own OHI+ assessment. There are four phases to the assessment process: Learn, Plan, Conduct, and Inform.

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Colombia's Ocean Indicator Framework

Colombia was one of the first countries to begin an OHI+ assessment: they have been working for 2.5 years. Their work has already yielded positive policy and management changes.


OHI+ Workshop in Indonesia

Welcome Indonesia, the largest island nation in the world, to our OHI+ community!

Conservation International - Indonesia has just hosted the first OHI workshop in Jakarta, attended by 60 stakeholders from government, academia, NGOs, and the private sector, and faciliated by our senior OHI manager, Erich Pacheco, and project scientist, Ning J. Mendes.

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