Nitari vs roker

Alopias pelagicus compared with Raja clavata

Key Differences

• Nitari is Endangered while roker is Near Threatened.

Taxonomic Classification

Rank	Nitari	roker
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Chondrichthyes (軟骨魚綱)	Elasmobranchii
Order	Lamniformes (ネズミザメ目)	Rajiformes (ガンギエイ目)
Family	Alopiidae	Rajidae
Genus	Alopias	Raja
Species	Alopias pelagicus	Raja clavata

Evolutionary Relationship

Nitari and roker share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Nitari

EN — Endangered

roker

NT — Near Threatened

Physical Characteristics

Attribute	Nitari	roker
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Nitari

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

Distributed across Colombia and Taiwan. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

roker

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Nitari

The Bigeye thresher (Alopias pelagicus) is a species in the genus Alopias. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.