The Species Black List
Sciadonus jonassoni
Jonasson's blind cusk-eel
Jonasson's blind cusk-eel (Sciadonus jonassoni) is a naturally rare species known from the Caribbean Sea off the coast of Venezuela and from the eastern Atlantic south of Cape Verde.
Status Data Deficient on the IUCN Red List Restriction tier 1, no restriction stated Class Actinopterygii Realm Oceanic Locality The Tropical Atlantic Region As IUCN records it Sciadonus jonassoni (Nybelin, 1957) This species is one of 3,062 in a list of vertebrates the IUCN Red List records as Data Deficient or has never assessed, ranked by how narrowly restricted the published record says they are. The sentence above is the evidence the tier was read from, quoted from Matthew Richardson, Threatened and Recently Extinct Vertebrates of the World (2023).
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Check this species elsewhere: IUCN Red List · GBIF