Otter, Fischotter vs Orinoco Four-eyed Opossum

Lutra lutra compared with Philander deltae

Key Differences

• Otter, Fischotter is Vulnerable while Orinoco Four-eyed Opossum is Least Concern.

Taxonomic Classification

Rank	Otter, Fischotter	Orinoco Four-eyed Opossum
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class same	Mammalia (Säugetiere)	Mammalia (Säugetiere)
Order	Carnivora (Raubtiere)	Didelphimorphia (Beutelrattenartige)
Family	Mustelidae (Weasels & Otters)	Didelphidae
Genus	Lutra (Otters)	Philander
Species	Lutra lutra	Philander deltae

Evolutionary Relationship

Otter, Fischotter and Orinoco Four-eyed Opossum share a common ancestor at the Class level: Mammalia. (Säugetiere)

Conservation Status

Otter, Fischotter

VU — Vulnerable

Trend: Stable →

Orinoco Four-eyed Opossum

LC — Least Concern

Physical Characteristics

Attribute	Otter, Fischotter	Orinoco Four-eyed Opossum
Diet	Carnivore	—
Average Lifespan	10 years	—
Average Length	1.0 m	—
Average Weight	10.0 kg	—

Habitat & Geographic Range

Otter, Fischotter

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.

Orinoco Four-eyed Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Venezuela.

Otter, Fischotter

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.