brittlestar vs Sea Knotgrass

Amphiura filiformis compared with Polygonum maritimum

Key Differences

• brittlestar is Least Concern while Sea Knotgrass is Not Evaluated.

Taxonomic Classification

Rank	brittlestar	Sea Knotgrass
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Echinodermata (Echinoderms)	Magnoliophyta (Flowering Plants)
Class	Ophiuroidea (Ophiuroidea)	Magnoliopsida (Dicots)
Order	Amphilepidida (Amphilepidida)	Caryophyllales (Caryophyllales)
Family	Amphiuridae	Polygonaceae
Genus	Amphiura	Polygonum
Species	Amphiura filiformis	Polygonum maritimum

Conservation Status

brittlestar

LC — Least Concern

Sea Knotgrass

NE — Not Evaluated

Physical Characteristics

Attribute	brittlestar	Sea Knotgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

brittlestar

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Sea Knotgrass

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Chile, India, and Portugal.

brittlestar

The Brittlestar (Amphiura filiformis) is a species in the genus Amphiura. It is currently classified as Least Concern on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.