African elephant vs coastal arrow worm

Loxodonta africana compared with Parasagitta setosa

Key Differences

• African elephant is Vulnerable while coastal arrow worm is Not Evaluated.

Taxonomic Classification

Rank	African elephant	coastal arrow worm
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum	Chordata (脊索动物门)	Chaetognatha (毛颚动物门)
Class	Mammalia (哺乳動物)	Sagittoidea (箭虫纲)
Order	Proboscidea (长鼻目)	Aphragmophora (无横肌目)
Family	Elephantidae (Elephants)	Sagittidae
Genus	Loxodonta (African Elephants)	Parasagitta
Species	Loxodonta africana	Parasagitta setosa

Evolutionary Relationship

African elephant and coastal arrow worm share a common ancestor at the Kingdom level: Animalia. (动物界)

Conservation Status

African elephant

VU — Vulnerable

Population: ~415.0K

Trend: Decreasing ↓

coastal arrow worm

NE — Not Evaluated

Physical Characteristics

Attribute	African elephant	coastal arrow worm
Diet	Herbivore	—
Average Lifespan	65 years	—
Average Length	6.0 m	—
Average Weight	6.0 t	—

Habitat & Geographic Range

African elephant

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical grasslands and savannas, and flooded grasslands and savannas, among 5 distinct biome types within the Afrotropic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Kenya. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

coastal arrow worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Russia.

African elephant

非洲象是地球上体型最大的陆地动物，体重可达7,000千克，栖息于撒哈拉以南非洲的草原、稀树草原和森林中。作为关键种，它们通过挖掘水源、传播种子和改变植被结构，深刻塑造了其栖息地的生态系统。受栖息地丧失和象牙盗猎威胁，非洲象的保护至关重要。

coastal arrow worm

Parasagitta setosa, the coastal arrow worm, is a chaetognath in the family Sagittidae inhabiting the coastal and neritic waters of the northeastern Atlantic Ocean and adjacent North Sea and Baltic Sea, with confirmed records from Denmark, Norway, and Russia. Arrow worms are small, transparent, torpedo-shaped marine invertebrates typically 1–5 centimeters long, and despite their common name, are neither worms nor closely related to any familiar animal group; they form their own phylum, Chaetognatha, comprising around 120 species. Parasagitta setosa is a predatory planktonic species, using stiff bristle-like grasping spines flanking its mouth to seize copepods, small fish larvae, and other zooplankton that form the bulk of its diet. It occupies neritic plankton communities, often occurring in brackish coastal waters and estuaries where many arrow worm species cannot tolerate reduced salinity. The species serves as an important prey item for fish including herring and sprat and functions as a significant link in coastal marine food webs. Arrow worm phylogenetic position has been debated extensively; molecular evidence places them near the base of protostome animals. The species is Not Evaluated by the IUCN, as marine zooplankton populations are rarely assessed due to monitoring challenges.