Big Finner vs Thread Weed

Balaenoptera physalus compared with Ulva compressa

Key Differences

• Big Finner is Endangered while Thread Weed is Least Concern.

Taxonomic Classification

Rank	Big Finner	Thread Weed
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Chlorophyta (Chlorophyta)
Class	Mammalia (Mammals)	Ulvophyceae (Ulvophyceae)
Order	Cetacea (Whales & Dolphins)	Ulvales (Ulvales)
Family	Balaenopteridae (Rorquals)	Ulvaceae
Genus	Balaenoptera (Rorquals)	Ulva
Species	Balaenoptera physalus	Ulva compressa

Conservation Status

Big Finner

EN — Endangered

Thread Weed

LC — Least Concern

Physical Characteristics

Attribute	Big Finner	Thread Weed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big Finner

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

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

Thread Weed

Habitat

Native to Asia and Europe and Oceania, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), Oceania and the Pacific (New Zealand), and South America (Brazil).

Big Finner

Big Finner (Balaenoptera physalus) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.

Shared Countries

Both species can be found in 5 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden 🇹🇼 Taiwan