Giant Otter vs Spinetail ray

Pteronura brasiliensis compared with Bathyraja spinicauda

Key Differences

• Giant Otter is Endangered while Spinetail ray is Near Threatened.

Taxonomic Classification

Rank	Giant Otter	Spinetail ray
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Elasmobranchii
Order	Carnivora (Carnivorans)	Rajiformes (Rajiformes)
Family	Mustelidae (Weasels & Otters)	Arhynchobatidae
Genus	Pteronura	Bathyraja
Species	Pteronura brasiliensis	Bathyraja spinicauda

Evolutionary Relationship

Giant Otter and Spinetail ray share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Giant Otter

EN — Endangered

Spinetail ray

NT — Near Threatened

Physical Characteristics

Attribute	Giant Otter	Spinetail ray
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Giant Otter

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

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

Spinetail ray

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.