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 (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Coelacanthi (Coelacanthi)
Order	Cetacea (Whales & Dolphins)	Coelacanthiformes (ปลาซีลาแคนท์)
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. (สัตว์มีแกนสันหลัง)

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

A living fossil thought extinct for 65 million years until rediscovered off South Africa in 1938, coelacanths can reach 2 meters and 90 kg. They belong to an ancient lobe-finned lineage more closely related to tetrapods than to ray-finned fish, making them scientifically invaluable for understanding vertebrate evolution. Found in deep rocky reef habitats of the Indian Ocean, they are nocturnal and undergo internal fertilization, giving birth to fully formed live young. Critically Endangered.