Hooded seal vs Thread Weed

Cystophora cristata compared with Ulva compressa

Key Differences

• Hooded seal is Endangered while Thread Weed is Least Concern.

Taxonomic Classification

Rank	Hooded seal	Thread Weed
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Chlorophyta (Chlorophyta)
Class	Mammalia (Mammals)	Ulvophyceae (Ulvophyceae)
Order	Pinnipedia (Seals & Sea Lions)	Ulvales (Ulvales)
Family	Phocidae (True Seals)	Ulvaceae
Genus	Cystophora	Ulva
Species	Cystophora cristata	Ulva compressa

Conservation Status

Hooded seal

EN — Endangered

Thread Weed

LC — Least Concern

Physical Characteristics

Attribute	Hooded seal	Thread Weed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Hooded seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Denmark, Norway, and Portugal. 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).

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal