arrow worm vs koala

Parasagitta elegans compared with Phascolarctos cinereus

Key Differences

• arrow worm is Not Evaluated while koala is Vulnerable.

Taxonomic Classification

Rank	arrow worm	koala
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum	Chaetognatha (毛颚动物门)	Chordata (脊索动物门)
Class	Sagittoidea (箭虫纲)	Mammalia (哺乳動物)
Order	Aphragmophora (无横肌目)	Diprotodontia (雙門齒目)
Family	Sagittidae	Phascolarctidae (Koalas)
Genus	Parasagitta	Phascolarctos (Koalas)
Species	Parasagitta elegans	Phascolarctos cinereus

Evolutionary Relationship

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

Conservation Status

arrow worm

NE — Not Evaluated

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	arrow worm	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

arrow worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark and Norway.

koala

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

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

arrow worm

The Arrow worm, Parasagitta elegans, is a species. Native to Europe, inhabiting ecosystems characteristic of the region.

koala

澳大利亚东部和东南部的标志性有袋类动物，体重最大可达15千克，为了节省低热量桉树叶食物所提供的能量，每天最多睡眠22小时。高度特化，能够处理会致大多数其他哺乳动物死亡的有毒桉树成分，拥有专门适应解毒功能的肠道微生物群。因衣原体病、栖息地开发和气候变化导致种群锐减，2022年被列为濒危物种。