Горбатый кит vs Columbia River Signal Crayfish

Megaptera novaeangliae compared with Pacifastacus leniusculus

Key Differences

• Горбатый кит is Vulnerable while Columbia River Signal Crayfish is Not Evaluated.

Taxonomic Classification

Rank	Горбатый кит	Columbia River Signal Crayfish
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum	Chordata (хордовые)	Arthropoda (членистоногие)
Class	Mammalia (млекопитающие)	Malacostraca (высшие раки)
Order	Cetacea (Whales & Dolphins)	Decapoda (десятиногие ракообразные)
Family	Balaenopteridae (Rorquals)	Astacidae
Genus	Megaptera (Humpback Whales)	Pacifastacus
Species	Megaptera novaeangliae	Pacifastacus leniusculus

Evolutionary Relationship

Горбатый кит and Columbia River Signal Crayfish share a common ancestor at the Kingdom level: Animalia. (животные)

Conservation Status

Горбатый кит

VU — Vulnerable

Population: ~80.0K

Trend: Increasing ↑

Columbia River Signal Crayfish

NE — Not Evaluated

Physical Characteristics

Attribute	Горбатый кит	Columbia River Signal Crayfish
Diet	Carnivore	—
Average Lifespan	50 years	—
Average Length	15.0 m	—
Average Weight	30.0 t	—

Habitat & Geographic Range

Горбатый кит

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 (5 countries), and South America (Colombia, Ecuador, Venezuela). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Columbia River Signal Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Widely distributed across Asia (Japan), Europe (26 countries), and North America (United States).

Горбатый кит

Among the most acrobatic of the great whales, humpback whales are renowned for their complex, haunting songs sung by males during breeding season — some lasting hours and evolving over time. Reaching 16 meters and 30 tonnes, they undertake the longest migrations of any mammal. Found in all oceans, humpbacks feed on krill and small fish using cooperative bubble-net feeding. Populations have largely recovered from historic whaling.

Columbia River Signal Crayfish

<em>Pacifastacus leniusculus</em>, the Columbia River signal crayfish, is a freshwater crustacean in the family Astacidae native to the Pacific Northwest of North America and widely introduced across Europe, Japan, and other regions. This species has not been evaluated by the IUCN but is recognised as one of the most ecologically damaging invasive freshwater species in Europe, present in 26 European countries, Japan, and its native range in the United States. Signal crayfish are large, aggressive, and highly fecund, capable of displacing native crayfish species through competition and through transmission of crayfish plague, a disease caused by the oomycete <em>Aphanomyces astaci</em>, to which North American crayfish have evolved resistance but European species have not. This species inhabits a wide range of freshwater environments including rivers, streams, lakes, and estuaries, as well as adjacent terrestrial habitats. Signal crayfish are omnivores, consuming aquatic plants, invertebrates, fish eggs, and organic detritus, and their burrowing activity can destabilise stream banks and increase turbidity. Management of invasive populations is a major focus of freshwater conservation in Europe. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden