common bottlenose dolphin vs Leatherback Sea Turtle

Tursiops truncatus compared with Dermochelys coriacea

Key Differences

• common bottlenose dolphin is Least Concern while Leatherback Sea Turtle is Vulnerable.
• Leatherback Sea Turtle is 1.7x heavier than common bottlenose dolphin.
• Leatherback Sea Turtle lives longer (50 years vs 45 years).

Taxonomic Classification

Rank	common bottlenose dolphin	Leatherback Sea Turtle
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class	Mammalia (млекопитающие)	Reptilia (пресмыкающиеся)
Order	Cetacea (Whales & Dolphins)	Testudines (черепахи)
Family	Delphinidae (Oceanic Dolphins)	Cheloniidae (Sea Turtles)
Genus	Tursiops (Bottlenose Dolphins)	Chelonia (Green Sea Turtles)
Species	Tursiops truncatus	Dermochelys coriacea

Evolutionary Relationship

common bottlenose dolphin and Leatherback Sea Turtle share a common ancestor at the Phylum level: Chordata. (хордовые)

Conservation Status

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	common bottlenose dolphin	Leatherback Sea Turtle
Diet	Carnivore	Carnivore
Average Lifespan	45 years	50 years
Average Length	3.0 m	2.0 m
Average Weight	300.0 kg	500.0 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).

Leatherback Sea Turtle

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 5 distinct biome types spanning the Australasia and Indomalayan and Neotropic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Costa Rica, Indonesia, Malaysia, and Trinidad and Tobago. 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.

Leatherback Sea Turtle

The leatherback is the largest living turtle and the fourth-heaviest reptile. Unlike other turtles, it has a soft, leathery shell.