Sea Lettuce vs Thread Weed

Ulva lactuca compared with Ulva compressa

Taxonomic Classification

Rank	Sea Lettuce	Thread Weed
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Chlorophyta (Chlorophyta)	Chlorophyta (Chlorophyta)
Class same	Ulvophyceae (Ulvophyceae)	Ulvophyceae (Ulvophyceae)
Order same	Ulvales (Ulvales)	Ulvales (Ulvales)
Family same	Ulvaceae	Ulvaceae
Genus same	Ulva	Ulva
Species	Ulva lactuca	Ulva compressa

Evolutionary Relationship

Sea Lettuce and Thread Weed share a common ancestor at the Genus level: Ulva.

Conservation Status

Sea Lettuce

LC — Least Concern

Thread Weed

LC — Least Concern

Physical Characteristics

Attribute	Sea Lettuce	Thread Weed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Sea Lettuce

Habitat

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

Range

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

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 6 countries:

🇧🇷 Brazil 🇳🇿 New Zealand 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden 🇹🇼 Taiwan