Otter, Fischotter vs Koala

Lutra lutra compared with Phascolarctos cinereus

Key Differences

• Otter, Fischotter is carnivore while Koala is herbivore.
• Koala lives longer (15 years vs 10 years).

Taxonomic Classification

Rank	Otter, Fischotter	Koala
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class same	Mammalia (Säugetiere)	Mammalia (Säugetiere)
Order	Carnivora (Raubtiere)	Diprotodontia (Marsupials)
Family	Mustelidae (Weasels & Otters)	Phascolarctidae (Koalas)
Genus	Lutra (Otters)	Phascolarctos (Koalas)
Species	Lutra lutra	Phascolarctos cinereus

Evolutionary Relationship

Otter, Fischotter and Koala share a common ancestor at the Class level: Mammalia. (Säugetiere)

Conservation Status

Otter, Fischotter

VU — Vulnerable

Trend: Stable →

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Otter, Fischotter	Koala
Diet	Carnivore	Herbivore
Average Lifespan	10 years	15 years
Average Length	1.0 m	75 cm
Average Weight	10.0 kg	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.

Koala

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Found in Australia. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Koala

Iconic marsupial of eastern and southeastern Australia, koalas weigh up to 15 kg and spend up to 22 hours daily sleeping to conserve energy from their low-calorie eucalyptus leaf diet. Highly specialized to process toxic eucalyptus compounds that would kill most other mammals, they have gut microbiomes uniquely adapted for detoxification. Listed as Endangered in 2022, with populations decimated by chlamydia disease, habitat clearing, and climate change.