Amazon River Dolphin vs Coelacanth

Inia geoffrensis compared with Latimeria chalumnae

Key Differences

Amazon River Dolphin is Data Deficient while Coelacanth is Critically Endangered.

Taxonomic Classification

Rank	Amazon River Dolphin	Coelacanth
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Coelacanthi (Coelacanthi)
Order	Cetacea (Whales & Dolphins)	Coelacanthiformes (シーラカンス)
Family	Iniidae	Latimeriidae
Genus	Inia	Latimeria
Species	Inia geoffrensis	Latimeria chalumnae

Evolutionary Relationship

Amazon River Dolphin and Coelacanth share a common ancestor at the Phylum level: Chordata. (脊索動物)

表示 Phylum: Chordata

Conservation Status

Amazon River Dolphin

DD — Data Deficient

Coelacanth

CR — Critically Endangered

Population: ~500

Trend: Decreasing ↓

Physical Characteristics

Attribute	Amazon River Dolphin	Coelacanth
Diet	—	Carnivore
Average Lifespan	—	100 years
Average Length	—	1.8 m
Average Weight	—	80.0 kg

Habitat & Geographic Range

Amazon River Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela.

Coelacanth

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 8 distinct biome types spanning the Australasia and Afrotropic and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Comoros, Indonesia, Mozambique, and South Africa. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Amazon River Dolphin

The Amazon River Dolphin (Inia geoffrensis) is a species in the genus Inia. Its conservation status is listed as Data Deficient, indicating insufficient data for assessment. Typically found in diverse terrestrial and aquatic ecosystems.

Coelacanth

1938年に南アフリカ沖で再発見されるまで6,500万年間絶滅していたと考えられていた生きた化石であるシーラカンスは、2メートル、90kgに達することができます。この種は条鰭類よりも四足動物に近い古代の肉鰭類の系統に属しており、脊椎動物の進化を理解する上で科学的に非常に重要です。インド洋の深い岩礁生息地に生息し、夜行性で体内受精により完全に形成された幼魚を産みます。絶滅危惧IA類（CR）種です。