Atlantic Dolphin vs Basking shark

Delphinus delphis compared with Rhincodon typus

Key Differences

• Atlantic Dolphin is Least Concern while Basking shark is Endangered.

Taxonomic Classification

Rank	Atlantic Dolphin	Basking shark
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Chondrichthyes (Cartilaginous Fish)
Order	Cetacea (Whales & Dolphins)	Lamniformes (Mackerel Sharks)
Family	Delphinidae (Oceanic Dolphins)	Rhincodontidae (Whale Sharks)
Genus	Delphinus	Rhincodon (Whale Sharks)
Species	Delphinus delphis	Rhincodon typus

Evolutionary Relationship

Atlantic Dolphin and Basking shark share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Atlantic Dolphin

LC — Least Concern

Basking shark

EN — Endangered

Trend: Decreasing ↓

Physical Characteristics

Attribute	Atlantic Dolphin	Basking shark
Diet	—	Omnivore
Average Lifespan	—	100 years
Average Length	—	12.0 m
Average Weight	—	20.0 t

Habitat & Geographic Range

Atlantic Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

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

Basking shark

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate grasslands and steppes, and montane grasslands and shrublands, among 5 distinct biome types within the Neotropic biogeographic realm.

Range

Distributed across Chile, Portugal, Taiwan, and Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Atlantic Dolphin

Atlantic Dolphin (Delphinus delphis) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Basking shark

The world's largest fish, whale sharks can exceed 12 meters and 20 tonnes, inhabiting tropical and warm temperate oceans worldwide. Despite their massive size, they are harmless filter feeders, consuming plankton, fish eggs, and small fish by swimming open-mouthed through prey-dense water. They undertake vast seasonal migrations following plankton blooms. Endangered due to fishing, boat strikes, and the live fin trade, with population declining by approximately 50% over the past 75 years.

Shared Countries

Both species can be found in 3 countries:

🇵🇹 Portugal 🇹🇼 Taiwan 🇻🇪 Venezuela