Aphid vs Otter, Fischotter

Cavariella archangelicae compared with Lutra lutra

Key Differences

• Aphid is Not Evaluated while Otter, Fischotter is Vulnerable.

Taxonomic Classification

Rank	Aphid	Otter, Fischotter
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Arthropoda (Gliederfüßer)	Chordata (Chordatiere)
Class	Insecta (Insekten)	Mammalia (Säugetiere)
Order	Hemiptera (Schnabelkerfe)	Carnivora (Raubtiere)
Family	Aphididae	Mustelidae (Weasels & Otters)
Genus	Cavariella	Lutra (Otters)
Species	Cavariella archangelicae	Lutra lutra

Evolutionary Relationship

Aphid and Otter, Fischotter share a common ancestor at the Kingdom level: Animalia. (Tier)

Conservation Status

Aphid

NE — Not Evaluated

Otter, Fischotter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Aphid	Otter, Fischotter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

Aphid

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Norway, Sweden, and United States.

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.

Aphid

The Aphid (Cavariella archangelicae) is a species in the genus Cavariella. Typically found in virtually all terrestrial and freshwater habitats.

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.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden