Conservation status

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Conservation status
Risk of extinction
Extinction

Extinct
Extinct in the Wild

Threatened

Critically Endangered
Endangered
Vulnerable
Threatened

Lower risk

Conservation Dependent
Near Threatened
Least Concern

See also

World Conservation Union
IUCN Red List

The conservation status of a species is an indicator of the likelihood of that species remaining extant either in the present day or the near future. Many factors are taken into account when assessing the conservation status of a species: not simply the number remaining, but the overall increase or decrease in the population over time, breeding success rates, known threats, and so on.

The IUCN Red List of Threatened Species is the best-known worldwide conservation status listing and ranking system. The system divides threatened species into three categories: Critically Endangered (CR), Endangered (EN), and Vulnerable (VU). Also listed are the documented extinctions that have occurred since 1500 AD and taxa that are extinct in the wild. Lower risk taxa are also divided into categories.

The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) aims to ensure that international trade in specimens of wild animals and plants does not threaten their survival.


Consumer guides for seafood, such as Seafood Watch, generally divide fish and other sea creatures into three categories, analogous to conservation status categories:

  • Red ("say no" or "avoid")
  • Yellow or orange ("think twice", "good alternatives" or "some concerns")
  • Green ("best seafood choices").

The categories do not simply reflect the imperilment of individual species, but also consider the environmental impacts of how and where they are fished, such as through bycatch or ocean bottom trawlers. Often groups of species are assessed rather than individual species (e.g. Bluefin tuna or squid).

The Marine Conservation Society has 5 levels of ratings for seafood species, as displayed on their Fishonline website.

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