Blue Dolphin vs Ray's Knotgrass

Stenella coeruleoalba compared with Polygonum oxyspermum

Key Differences

• Blue Dolphin is Least Concern while Ray's Knotgrass is Endangered.

Taxonomic Classification

Rank	Blue Dolphin	Ray's Knotgrass
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Magnoliopsida (Dicots)
Order	Cetacea (Whales & Dolphins)	Caryophyllales (Caryophyllales)
Family	Delphinidae (Oceanic Dolphins)	Polygonaceae
Genus	Stenella	Polygonum
Species	Stenella coeruleoalba	Polygonum oxyspermum

Conservation Status

Blue Dolphin

LC — Least Concern

Ray's Knotgrass

EN — Endangered

Physical Characteristics

Attribute	Blue Dolphin	Ray's Knotgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), and South America (Colombia, Ecuador, Venezuela).

Ray's Knotgrass

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

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

Blue Dolphin

Blue Dolphin (Stenella coeruleoalba) 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.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden