African elephant vs common nut clam

Loxodonta africana compared with Nucula nucleus

Key Differences

• African elephant is Vulnerable while common nut clam is Least Concern.

Taxonomic Classification

Rank	African elephant	common nut clam
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Mollusca (軟体動物)
Class	Mammalia (哺乳類)	Bivalvia (二枚貝)
Order	Proboscidea (ゾウ目)	Nuculida (Nuculida)
Family	Elephantidae (Elephants)	Nuculidae
Genus	Loxodonta (African Elephants)	Nucula
Species	Loxodonta africana	Nucula nucleus

Evolutionary Relationship

African elephant and common nut clam share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

African elephant

VU — Vulnerable

Population: ~415.0K

Trend: Decreasing ↓

common nut clam

LC — Least Concern

Physical Characteristics

Attribute	African elephant	common nut clam
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.

common nut clam

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

African elephant

地球上最大の陸上動物であるアフリカゾウは体重7,000 kgに達し、サハラ以南のサバンナ、森林、湿地に生息する。成熟した雌が群れを率いる高度に知的な社会構造を持ち、超低周波音やうなり声、接触によって意思疎通する。木を引き倒したり水飲み場を掘ったり種子を散布したりすることで生態系を形成するエンジニア種だが、象牙の密猟や生息地の喪失により個体数は減少しており、危急（VU）とされている。

common nut clam

<em>Nucula nucleus</em>, the common nut clam, is a small marine bivalve mollusk in the family Nuculidae, among the most primitive living bivalves in terms of evolutionary lineage. This deposit-feeding species typically burrows into soft sediments — muddy and sandy substrates — in coastal and subtidal marine environments. <em>Nucula nucleus</em> uses its elongated palp proboscides to sort organic particles and detritus from sediment, making it a key functional contributor to benthic nutrient cycling. Its geographic range spans European Atlantic and Mediterranean coasts, with documented occurrences in Belgium, Denmark, Norway, and Sweden, typically in sheltered bays, estuaries, and sublittoral soft-bottom habitats. The species is currently assessed as Least Concern by the IUCN. Biological traits such as lifespan, body size, and diet remain poorly documented at a population level for this species in formal assessments, though it is known as a selective deposit feeder. The common nut clam plays an important role in benthic community structure and sediment processing, and serves as prey for demersal fish, sea stars, and other bottom-dwelling predators across its European range.