Alaskan Brook Lamprey vs blue whale

Lethenteron alaskense compared with Balaenoptera musculus

Key Differences

Alaskan Brook Lamprey is Data Deficient while blue whale is Vulnerable.

Taxonomic Classification

Rank	Alaskan Brook Lamprey	blue whale
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Petromyzonti (Petromyzonti)	Mammalia (Mammals)
Order	Petromyzontiformes (lamprey)	Cetacea (Whales & Dolphins)
Family	Petromyzontidae	Balaenopteridae (Rorquals)
Genus	Lethenteron	Balaenoptera (Rorquals)
Species	Lethenteron alaskense	Balaenoptera musculus

Evolutionary Relationship

Alaskan Brook Lamprey and blue whale share a common ancestor at the Phylum level: Chordata. (Chordates)

View Phylum: Chordata

Conservation Status

Alaskan Brook Lamprey

DD — Data Deficient

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

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

Habitat & Geographic Range

Alaskan Brook Lamprey

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.

Alaskan Brook Lamprey

The Alaskan Brook Lamprey (Lethenteron alaskense) is a species in the genus Lethenteron. Its conservation status is listed as Data Deficient, indicating insufficient data for assessment.

blue whale

The largest animal ever known to have lived on Earth, blue whales can reach 33 meters and 200 tonnes — their hearts alone weigh as much as a small car. Found in all oceans, they migrate between polar feeding grounds and tropical breeding areas. Filter feeders consuming up to 4 tonnes of krill daily. Endangered, with global populations estimated at 10,000–25,000 after near-extinction from 20th-century whaling.