Shiro-shumokuzame vs Hira-shumokuzame

Sphyrna zygaena compared with Sphyrna mokarran

Key Differences

Shiro-shumokuzame is Not Evaluated while Hira-shumokuzame is Critically Endangered.

Taxonomic Classification

Rank	Shiro-shumokuzame	Hira-shumokuzame
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Chondrichthyes (軟骨魚綱)	Chondrichthyes (軟骨魚綱)
Order same	Carcharhiniformes (メジロザメ目)	Carcharhiniformes (メジロザメ目)
Family same	Sphyrnidae (Hammerhead Sharks)	Sphyrnidae (Hammerhead Sharks)
Genus same	Sphyrna (Hammerhead Sharks)	Sphyrna (Hammerhead Sharks)
Species	Sphyrna zygaena	Sphyrna mokarran

Evolutionary Relationship

Shiro-shumokuzame and Hira-shumokuzame share a common ancestor at the Genus level: Sphyrna. (Hammerhead Sharks)

表示 Genus: Sphyrna

Conservation Status

Shiro-shumokuzame

NE — Not Evaluated

Hira-shumokuzame

CR — Critically Endangered

Trend: Decreasing ↓

Physical Characteristics

Attribute	Shiro-shumokuzame	Hira-shumokuzame
Diet	—	Carnivore
Average Lifespan	—	40 years
Average Length	—	5.0 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Shiro-shumokuzame

Habitat

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

Range

Distributed across Chile, Denmark, Portugal, Sweden, and Taiwan.

Hira-shumokuzame

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 5 distinct biome types spanning the Indomalayan and Neotropic and Oceanian realms. Populations are also found in montane and highland environments at higher elevations.

Range

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

Shiro-shumokuzame

The common hammerhead, <em>Sphyrna zygaena</em>, is a cartilaginous fish belonging to the order Carcharhiniformes, family Sphyrnidae. This species is typically found in marine environments and has a distribution that includes the waters of Chile, Denmark, Portugal, Sweden, and Taiwan, reflecting a wide range across both Atlantic and Pacific Ocean systems. As a hammerhead shark, <em>Sphyrna zygaena</em> possesses the characteristic cephalofoil, the laterally expanded head structure that provides enhanced sensory capabilities and hydrodynamic benefits. Hammerhead sharks are generally known to be active, wide-ranging predators within marine ecosystems. No dietary information has been provided for this specific species in current records. Biological traits of this species remain poorly documented in the scientific literature.

Hira-shumokuzame

最大のシュモクザメ種であるオオシュモクザメは最大6メートルに達し、世界中の熱帯および亜熱帯の沿岸海域に生息します。T字型の特徴的な頭部（セファロフォイル）は電気受容のための感覚表面積を著しく増大させ、砂の中に潜むアカエイを卓越した精度で探知することを可能にしています。アカエイは好物の餌です。高価値のヒレと混獲死亡により個体群が劇的に減少し、絶滅危惧IA類に分類されています。