blue whale vs

Balaenoptera musculus compared with Chrysochromulina apheles

Key Differences

blue whale is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	blue whale
Kingdom	Animalia (動物)	Chromista (クロミスタ)
Phylum	Chordata (脊索動物)	Haptophyta (ハプト藻)
Class	Mammalia (哺乳類)	Prymnesiophyceae (Prymnesiophyceae)
Order	Cetacea (Whales & Dolphins)	Prymnesiales (Prymnesiales)
Family	Balaenopteridae (Rorquals)	Chrysochromulinaceae
Genus	Balaenoptera (Rorquals)	Chrysochromulina
Species	Balaenoptera musculus	Chrysochromulina apheles

Conservation Status

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

NE — Not Evaluated

Physical Characteristics

Attribute	blue whale
Diet	Carnivore	—
Average Lifespan	90 years	—
Average Length	30.0 m	—
Average Weight	150.0 t	—

Habitat & Geographic Range

blue whale

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 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Norway, and Sweden.

blue whale

地球上で生きたことが知られている最大の動物であるシロナガスクジラ（Balaenoptera musculus）は、体長33メートル、体重200トンに達することができ、心臓だけで小型自動車ほどの重さがあります。全ての海洋に生息し、極地の餌場と熱帯の繁殖地の間を回遊します。1日最大4トンのオキアミを摂取する濾過摂食者です。20世紀の捕鯨による絶滅危機からの回復後、世界的な個体数は10,000〜25,000頭と推定される絶滅危惧種です。

Chrysochromulina apheles is a marine haptophyte microalga in the genus Chrysochromulina, family Chrysochromulinaceae, class Prymnesiophyceae. Members of this genus are distinguished by their coiling haptonema, two flagella of approximately equal length, and a covering of organic scales on the cell surface — features used extensively in species identification through electron microscopy. C. apheles inhabits coastal marine environments and has been recorded from Norwegian and Swedish waters, regions where intensive phycological surveys during the late twentieth century yielded numerous new haptophyte species descriptions. These subarctic and temperate Atlantic coastal waters sustain diverse nanoplankton communities in which Chrysochromulina species are frequently abundant components. The epithet apheles derives from Greek, referencing a morphological characteristic of the cell or scale structure. As a phytoplankton organism, C. apheles participates in primary production, converting inorganic carbon to organic matter through photosynthesis, and may also engage in phagotrophy of bacterial cells. Some Chrysochromulina species produce polyunsaturated fatty acids and occasionally bioactive compounds. The taxon has not been evaluated under IUCN criteria and carries a conservation status of Not Evaluated, reflecting the general challenge of assessing extinction risk in free-living marine microalgae whose populations are cosmopolitan and difficult to census. Understanding the ecology and distribution of species like C. apheles contributes to knowledge of marine microbial diversity and the functioning of pelagic food webs in northern Atlantic ecosystems.