European otter vs marbled crayfish

Lutra lutra compared with Procambarus virginalis

Key Differences

European otter is Vulnerable while marbled crayfish is Not Evaluated.

Taxonomic Classification

Rank	European otter	marbled crayfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Malacostraca (Crustaceans)
Order	Carnivora (Carnivorans)	Decapoda (Decapoda)
Family	Mustelidae (Weasels & Otters)	Cambaridae
Genus	Lutra (Otters)	Procambarus
Species	Lutra lutra	Procambarus virginalis

Evolutionary Relationship

European otter and marbled crayfish share a common ancestor at the Kingdom level: Animalia. (Animals)

View Kingdom: Animalia

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

marbled crayfish

NE — Not Evaluated

Physical Characteristics

Attribute	European otter	marbled crayfish
Diet	Carnivore	—
Average Lifespan	10 years	—
Average Length	1.0 m	—
Average Weight	10.0 kg	—

Habitat & Geographic 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.

marbled crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Widely distributed across Africa (Madagascar), Asia (Taiwan), and Europe (4 countries).

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.