Basking shark vs Big-eared opossum

Rhincodon typus compared with Didelphis aurita

Key Differences

• Basking shark is Endangered while Big-eared opossum is Least Concern.

Taxonomic Classification

Rank	Basking shark	Big-eared opossum
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Mammalia (Mammals)
Order	Lamniformes (Mackerel Sharks)	Didelphimorphia (Didelphimorphia)
Family	Rhincodontidae (Whale Sharks)	Didelphidae
Genus	Rhincodon (Whale Sharks)	Didelphis
Species	Rhincodon typus	Didelphis aurita

Evolutionary Relationship

Basking shark and Big-eared opossum share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Basking shark

EN — Endangered

Trend: Decreasing ↓

Big-eared opossum

LC — Least Concern

Physical Characteristics

Attribute	Basking shark	Big-eared opossum
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.

Big-eared opossum

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.

Big-eared opossum

The Big-eared opossum (Didelphis aurita) is a species in the genus Didelphis. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.