鯨鯊 vs Polar bear

Rhincodon typus compared with Ursus maritimus

Key Differences

• 鯨鯊 is Endangered while Polar bear is Vulnerable.
• 鯨鯊 is omnivore while Polar bear is carnivore.
• 鯨鯊 is 44.4x heavier than Polar bear.
• 鯨鯊 lives longer (100 years vs 25 years).

Taxonomic Classification

Rank	鯨鯊	Polar bear
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class	Chondrichthyes (软骨鱼纲)	Mammalia (哺乳動物)
Order	Lamniformes (鼠鲨目)	Carnivora (食肉目)
Family	Rhincodontidae (Whale Sharks)	Ursidae (Bears)
Genus	Rhincodon (Whale Sharks)	Ursus (Bears)
Species	Rhincodon typus	Ursus maritimus

Evolutionary Relationship

鯨鯊 and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

鯨鯊

EN — Endangered

Trend: Decreasing ↓

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	鯨鯊	Polar bear
Diet	Omnivore	Carnivore
Average Lifespan	100 years	25 years
Average Length	12.0 m	2.4 m
Average Weight	20.0 t	450.0 kg

Habitat & Geographic Range

鯨鯊

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate grasslands and steppes, and montane grasslands and shrublands, among 5 distinct biome types within the Neotropic biogeographic realm.

Range

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

鯨鯊

鲸鲨（Rhincodon typus）是世界上最大的鱼类，体长可超过12米、体重逾20吨，广泛分布于全球热带及温暖温带海洋。尽管体型巨大，它们却是无害的滤食性动物，以浮游生物、鱼卵和小鱼为食，通过张口游动来过滤水中的猎物。它们随浮游生物爆发进行大规模的季节性洄游。受捕捞、船只碰撞及活体鱼翅贸易影响，过去75年间种群数量减少约50%，被列为濒危物种。

Polar bear

北极熊是地球上最大的陆地食肉动物，体重可超过700千克，分布于从加拿大到俄罗斯的北极海冰区。是高度特化的海洋哺乳动物，依赖海冰捕猎环斑海豹和髯海豹。是优秀的游泳者，能够横渡广阔的开阔水域。被列为易危种，因气候变化导致北极海冰迅速减少，种群正受到严重威胁。