common bottlenose dolphin vs Ray's Knotgrass

Tursiops truncatus compared with Polygonum oxyspermum

Key Differences

common bottlenose dolphin is Least Concern while Ray's Knotgrass is Endangered.

Taxonomic Classification

Rank	common bottlenose dolphin	Ray's Knotgrass
Kingdom	Animalia (สัตว์)	Plantae (พืช)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Magnoliophyta (Flowering Plants)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Magnoliopsida (พืชใบเลี้ยงคู่)
Order	Cetacea (Whales & Dolphins)	Caryophyllales (อันดับคาร์เนชัน)
Family	Delphinidae (Oceanic Dolphins)	Polygonaceae
Genus	Tursiops (Bottlenose Dolphins)	Polygonum
Species	Tursiops truncatus	Polygonum oxyspermum

Conservation Status

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Ray's Knotgrass

EN — Endangered

Physical Characteristics

Attribute	common bottlenose dolphin	Ray's Knotgrass
Diet	Carnivore	—
Average Lifespan	45 years	—
Average Length	3.0 m	—
Average Weight	300.0 kg	—

Habitat & Geographic Range

common bottlenose dolphin

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 12 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (6 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.

common bottlenose dolphin

The most studied and recognized dolphin species, bottlenose dolphins inhabit warm and temperate oceans worldwide, from coastal shallows to the open sea. Highly intelligent with large brains relative to body size, they demonstrate self-recognition, complex communication, and social learning. They live in fluid fission-fusion societies and cooperate to herd fish. A keystone indicator species for marine ecosystem health.