Atlantic Gray Seal vs Basking shark

Halichoerus grypus compared with Rhincodon typus

Key Differences

• Atlantic Gray Seal is Vulnerable while Basking shark is Endangered.

Taxonomic Classification

Rank	Atlantic Gray Seal	Basking shark
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Chondrichthyes (Cartilaginous Fish)
Order	Pinnipedia (Seals & Sea Lions)	Lamniformes (Mackerel Sharks)
Family	Phocidae (True Seals)	Rhincodontidae (Whale Sharks)
Genus	Halichoerus	Rhincodon (Whale Sharks)
Species	Halichoerus grypus	Rhincodon typus

Evolutionary Relationship

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

Conservation Status

Atlantic Gray Seal

VU — Vulnerable

Basking shark

EN — Endangered

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Atlantic Gray Seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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 Gray Seal

The Atlantic Gray Seal (Halichoerus grypus) is a species in the genus Halichoerus. It is currently classified as Vulnerable on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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 1 countries:

🇵🇹 Portugal