Ballena azul vs squirrel’s tail hydroid

Balaenoptera musculus compared with Sertularia argentea

Key Differences

Ballena azul is Vulnerable while squirrel’s tail hydroid is Not Evaluated.

Taxonomic Classification

Rank	Ballena azul	squirrel’s tail hydroid
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (cordados)	Cnidaria (Cnidarians)
Class	Mammalia (mamíferos)	Hydrozoa (Hydrozoa)
Order	Cetacea (Whales & Dolphins)	Leptothecata (Leptothecata)
Family	Balaenopteridae (Rorquals)	Sertulariidae
Genus	Balaenoptera (Rorquals)	Sertularia
Species	Balaenoptera musculus	Sertularia argentea

Evolutionary Relationship

Ballena azul and squirrel’s tail hydroid share a common ancestor at the Kingdom level: Animalia. (Animals)

Vista Kingdom: Animalia

Conservation Status

Ballena azul

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

squirrel’s tail hydroid

NE — Not Evaluated

Physical Characteristics

Attribute	Ballena azul	squirrel’s tail hydroid
Diet	Carnivore	—
Average Lifespan	90 years	—
Average Length	30.0 m	—
Average Weight	150.0 t	—

Habitat & Geographic Range

Ballena azul

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.

squirrel’s tail hydroid

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

Ballena azul

El animal más grande que se conoce haya vivido en la Tierra; las ballenas azules pueden alcanzar 33 metros y 200 toneladas — sus corazones solos pesan tanto como un automóvil pequeño. Se encuentran en todos los océanos y migran entre las zonas de alimentación polares y las áreas de reproducción tropicales. Son filtradoras que consumen hasta 4 toneladas de kril al día. En peligro de extinción, con poblaciones globales estimadas entre 10.000 y 25.000 tras casi extinguirse por la caza de ballenas en el siglo XX.