Polar bear vs Porcupinefish

Ursus maritimus compared with Diodon holocanthus

Key Differences

Polar bear is Vulnerable while Porcupinefish is Least Concern.
Polar bear is carnivore while Porcupinefish is omnivore.
Polar bear is 900.0x heavier than Porcupinefish.
Polar bear lives longer (25 years vs 10 years).

Taxonomic Classification

Rank	Polar bear	Porcupinefish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Actinopterygii (Ray-finned Fish)
Order	Carnivora (Carnivorans)	Perciformes (Perch-like Fish)
Family	Ursidae (Bears)	Pomacentridae (Clownfish & Damselfish)
Genus	Ursus (Bears)	Amphiprion (Clownfish)
Species	Ursus maritimus	Diodon holocanthus

Evolutionary Relationship

Polar bear and Porcupinefish share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Porcupinefish

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Polar bear	Porcupinefish
Diet	Carnivore	Omnivore
Average Lifespan	25 years	10 years
Average Length	2.4 m	30 cm
Average Weight	450.0 kg	500 g

Habitat & Geographic Range

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Porcupinefish

Habitat

Typically found in a wide range of habitat types.

Range

Distributed across Australia, Bahamas, Japan, and Mexico.

Polar bear

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.