Hourglass Dolphin vs roker

Lagenorhynchus cruciger compared with Raja clavata

Key Differences

• Hourglass Dolphin is Least Concern while roker is Near Threatened.

Taxonomic Classification

Rank	Hourglass Dolphin	roker
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Elasmobranchii
Order	Cetacea (Whales & Dolphins)	Rajiformes (Rajiformes)
Family	Delphinidae (Oceanic Dolphins)	Rajidae
Genus	Lagenorhynchus	Raja
Species	Lagenorhynchus cruciger	Raja clavata

Evolutionary Relationship

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

Conservation Status

Hourglass Dolphin

LC — Least Concern

roker

NT — Near Threatened

Physical Characteristics

Attribute	Hourglass Dolphin	roker
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Hourglass Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

roker

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.