Bigeye Sixgill Shark vs 瓶鼻海豚

Hexanchus nakamurai compared with Tursiops truncatus

Key Differences

• Bigeye Sixgill Shark is Near Threatened while 瓶鼻海豚 is Least Concern.

Taxonomic Classification

Rank	Bigeye Sixgill Shark	瓶鼻海豚
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class	Elasmobranchii	Mammalia (哺乳動物)
Order	Hexanchiformes (六鳃鲨目)	Cetacea (Whales & Dolphins)
Family	Hexanchidae	Delphinidae (Oceanic Dolphins)
Genus	Hexanchus	Tursiops (Bottlenose Dolphins)
Species	Hexanchus nakamurai	Tursiops truncatus

Evolutionary Relationship

Bigeye Sixgill Shark and 瓶鼻海豚 share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

Bigeye Sixgill Shark

NT — Near Threatened

瓶鼻海豚

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Physical Characteristics

Attribute	Bigeye Sixgill Shark	瓶鼻海豚
Diet	—	Carnivore
Average Lifespan	—	45 years
Average Length	—	3.0 m
Average Weight	—	300.0 kg

Habitat & Geographic Range

Bigeye Sixgill Shark

Habitat

Native to Asia and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Taiwan and Venezuela. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

瓶鼻海豚

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 12 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and South America (Colombia, Ecuador, Venezuela).

Bigeye Sixgill Shark

The Bigeye Sixgill Shark (Hexanchus nakamurai) is a species in the genus Hexanchus. It is currently classified as Near Threatened on the IUCN Red List. Native to Asia and South America, inhabiting ecosystems characteristic of the region.

瓶鼻海豚

作为研究最广泛、最受认可的海豚物种，宽吻海豚栖息于全球从沿岸浅水到远洋的温暖和温带海域。高度智能，大脑相对体型较大，展示自我认知、复杂交流和社会学习。生活在流动的分裂-融合社会中，合作围捕鱼群。是海洋生态系统健康的关键指示物种。

Shared Countries

Both species can be found in 2 countries:

🇹🇼 Taiwan 🇻🇪 Venezuela