common bottlenose dolphin vs European otter

Tursiops truncatus compared with Lutra lutra

Key Differences

• common bottlenose dolphin is Least Concern while European otter is Vulnerable.
• common bottlenose dolphin is 30.0x heavier than European otter.
• common bottlenose dolphin lives longer (45 years vs 10 years).

Taxonomic Classification

Rank	common bottlenose dolphin	European otter
Kingdom same	Animalia (प्राणी)	Animalia (प्राणी)
Phylum same	Chordata (रज्जुकी)	Chordata (रज्जुकी)
Class same	Mammalia (स्तनधारी)	Mammalia (स्तनधारी)
Order	Cetacea (Whales & Dolphins)	Carnivora (मांसाहारी गण)
Family	Delphinidae (Oceanic Dolphins)	Mustelidae (Weasels & Otters)
Genus	Tursiops (Bottlenose Dolphins)	Lutra (Otters)
Species	Tursiops truncatus	Lutra lutra

Evolutionary Relationship

common bottlenose dolphin and European otter share a common ancestor at the Class level: Mammalia. (स्तनधारी)

Conservation Status

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	common bottlenose dolphin	European otter
Diet	Carnivore	Carnivore
Average Lifespan	45 years	10 years
Average Length	3.0 m	1.0 m
Average Weight	300.0 kg	10.0 kg

Habitat & Geographic Range

common bottlenose dolphin

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 12 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and South America (Colombia, Ecuador, Venezuela).

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.

common bottlenose dolphin

The most studied and recognized dolphin species, bottlenose dolphins inhabit warm and temperate oceans worldwide, from coastal shallows to the open sea. Highly intelligent with large brains relative to body size, they demonstrate self-recognition, complex communication, and social learning. They live in fluid fission-fusion societies and cooperate to herd fish. A keystone indicator species for marine ecosystem health.

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.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇦 Ukraine