Basking shark vs Hourglass Dolphin

Rhincodon typus compared with Lagenorhynchus cruciger

Key Differences

Basking shark is Endangered while Hourglass Dolphin is Least Concern.

Taxonomic Classification

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

Evolutionary Relationship

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

View Phylum: Chordata

Conservation Status

Basking shark

EN — Endangered

Trend: Decreasing ↓

Hourglass Dolphin

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic 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.

Hourglass Dolphin

Habitat

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.