Fatspine spurdog vs Taiwan spurdog

Squalus crassispinus compared with Squalus formosus

Key Differences

• Fatspine spurdog is Least Concern while Taiwan spurdog is Endangered.

Taxonomic Classification

Rank	Fatspine spurdog	Taiwan spurdog
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Elasmobranchii	Elasmobranchii
Order same	Squaliformes (Squaliformes)	Squaliformes (Squaliformes)
Family same	Squalidae	Squalidae
Genus same	Squalus	Squalus
Species	Squalus crassispinus	Squalus formosus

Evolutionary Relationship

Fatspine spurdog and Taiwan spurdog share a common ancestor at the Genus level: Squalus.

Conservation Status

Fatspine spurdog

LC — Least Concern

Taiwan spurdog

EN — Endangered

Physical Characteristics

Attribute	Fatspine spurdog	Taiwan spurdog
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Fatspine spurdog

Taiwan spurdog

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

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