For threatened species and species believed to have become extinct after 1500, the categories are based on the IUCN (International Union for Conservation of Nature and Natural Resources) Red List 1994 or 2001 categories. Such species should be classified using the criteria directly using the most up-to-date database.
Notes[]
- PE and PEW (Probably Extinct and Probably Extinct in the Wild) are not official IUCN categories, but PE has been adopted by Birdlife International, and the terms appear within the IUCN Red List entries.
- EX = Extinct
- EW = Extinct in the wild
- CR = Critically Endangered
- EN = Endangered
- VU = Vulnerable
- NT = Near Threatened
- LC = Least Concern
- DD = Data deficient
- NE = Not evaluated
- PE = Probably extinct (informal)
- PEW = Probably extinct in the wild (informal)
Least Concern
Near Threatened
Vulnerable
Endangered
Critically Endangered
Data Deficient
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| Marine | Marine Habitats • Aquariums • Global Oceans • Ocean Weather
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| Vertebrate | Fishes • Mammals • Reptiles • Amphibians • Cartilaginous Fishes • Sharks
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| Invertebrate | Arthropod • Mollusca • Echinoderms • Cnidaria
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| Conservation Status | Critically Endangered • Endangered • Near Threatened • Vulnerable • Least Concern • Data Deficient • Not Evaluated |