Alligatorweed vs Common Seal

Alternanthera philoxeroides compared with Phoca vitulina

Key Differences

Alligatorweed is Not Evaluated while Common Seal is Near Threatened.

Taxonomic Classification

Rank	Alligatorweed	Common Seal
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Caryophyllales (Caryophyllales)	Pinnipedia (Seals & Sea Lions)
Family	Amaranthaceae	Phocidae (True Seals)
Genus	Alternanthera	Phoca (Harbor Seals)
Species	Alternanthera philoxeroides	Phoca vitulina

Conservation Status

Alligatorweed

NE — Not Evaluated

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Physical Characteristics

Attribute	Alligatorweed	Common Seal
Diet	—	Carnivore
Average Lifespan	—	30 years
Average Length	—	1.7 m
Average Weight	—	80.0 kg

Habitat & Geographic Range

Alligatorweed

Habitat

Inhabits tropical and subtropical moist broadleaf forests and mangrove forests and coastal wetlands within the Indomalayan biogeographic realm.

Range

Widely distributed across Africa (Comoros, Madagascar), Asia (14 countries), Europe (9 countries), North America (Honduras, Mexico, United States), Oceania and the Pacific (Australia, New Zealand), and South America (4 countries).

Common Seal

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (7 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Alligatorweed

The Alligatorweed (Alternanthera philoxeroides) is a species in the genus Alternanthera. Inhabits tropical and subtropical moist broadleaf forests and mangrove forests and coastal wetlands within the Indomalayan biogeographic realm.

Common Seal

The most widely distributed pinniped, harbor seals inhabit temperate and subarctic coastal waters of both the North Atlantic and North Pacific. Adults reach up to 130 kg and spend roughly equal time at sea hunting fish, squid, and crustaceans and hauling out on beaches or rocks to rest. Their large, expressive eyes are adapted for underwater vision in low light. Harbor seals are a critical food source for orcas, sharks, and polar bears.