coastal arrow worm vs gorilla

Parasagitta setosa compared with Gorilla gorilla

Key Differences

• coastal arrow worm is Not Evaluated while gorilla is Critically Endangered.

Taxonomic Classification

Rank	coastal arrow worm	gorilla
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chaetognatha (毛顎動物)	Chordata (脊索動物)
Class	Sagittoidea (Sagittoidea)	Mammalia (哺乳類)
Order	Aphragmophora (Aphragmophora)	Primates (サル目)
Family	Sagittidae	Hominidae (Great Apes)
Genus	Parasagitta	Gorilla (Gorillas)
Species	Parasagitta setosa	Gorilla gorilla

Evolutionary Relationship

coastal arrow worm and gorilla share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

coastal arrow worm

NE — Not Evaluated

gorilla

CR — Critically Endangered

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	coastal arrow worm	gorilla
Diet	—	Herbivore
Average Lifespan	—	40 years
Average Length	—	1.7 m
Average Weight	—	160.0 kg

Habitat & Geographic Range

coastal arrow worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Russia.

gorilla

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 4 distinct biome types within the Afrotropic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Cameroon, Congo (Republic), Equatorial Guinea, and Gabon. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

gorilla

世界最大の霊長類であるニシゴリラは体重が最大180kgに達し、赤道アフリカの熱帯・亜熱帯の森林に生息する。主に草食性で、群れを守り社会的な対立を仲裁するシルバーバック雄が率いる家族集団を形成する。森林破壊、食肉目的の密猟、エボラウイルス感染症の流行により脅威にさらされており、近絶滅種（CR）に指定されている。