Coelacanth vs European otter

Latimeria chalumnae compared with Lutra lutra

Key Differences

• Coelacanth is Critically Endangered while European otter is Vulnerable.
• Coelacanth is 8.0x heavier than European otter.
• Coelacanth lives longer (100 years vs 10 years).

Taxonomic Classification

Rank	Coelacanth	European otter
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Coelacanthi (Coelacanthi)	Mammalia (Mammals)
Order	Coelacanthiformes (Coelacanthiformes)	Carnivora (Carnivorans)
Family	Latimeriidae	Mustelidae (Weasels & Otters)
Genus	Latimeria	Lutra (Otters)
Species	Latimeria chalumnae	Lutra lutra

Evolutionary Relationship

Coelacanth and European otter share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Coelacanth

CR — Critically Endangered

Population: ~500

Trend: Decreasing ↓

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Coelacanth	European otter
Diet	Carnivore	Carnivore
Average Lifespan	100 years	10 years
Average Length	1.8 m	1.0 m
Average Weight	80.0 kg	10.0 kg

Habitat & Geographic 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.

European otter

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

European otter

Sleek semi-aquatic mustelid found along clean rivers, streams, and coastlines across Europe and Asia. European otters can reach 1.3 meters in length and are highly skilled fish hunters, using sensitive whiskers to detect prey movements. Requiring unpolluted water with abundant fish, they are an indicator species for freshwater ecosystem health. Once nearly extinct in Western Europe from hunting and pollution, populations have recovered significantly following water quality improvements.