Atlantic Gray Seal vs Coelacanth

Halichoerus grypus compared with Latimeria chalumnae

Key Differences

Atlantic Gray Seal is Vulnerable while Coelacanth is Critically Endangered.

Taxonomic Classification

Rank	Atlantic Gray Seal	Coelacanth
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Coelacanthi (Coelacanthi)
Order	Pinnipedia (Seals & Sea Lions)	Coelacanthiformes (Coelacanthiformes)
Family	Phocidae (True Seals)	Latimeriidae
Genus	Halichoerus	Latimeria
Species	Halichoerus grypus	Latimeria chalumnae

Evolutionary Relationship

Atlantic Gray Seal and Coelacanth share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Atlantic Gray Seal

VU — Vulnerable

Coelacanth

CR — Critically Endangered

Population: ~500

Trend: Decreasing ↓

Physical Characteristics

Attribute	Atlantic Gray Seal	Coelacanth
Diet	—	Carnivore
Average Lifespan	—	100 years
Average Length	—	1.8 m
Average Weight	—	80.0 kg

Habitat & Geographic Range

Atlantic Gray Seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Atlantic Gray Seal

The Atlantic Gray Seal (Halichoerus grypus) is a species in the genus Halichoerus. It is currently classified as Vulnerable on the IUCN Red List. 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.