Centric diatom vs Commerson s Dolphin

Skeletonema subsalsum compared with Cephalorhynchus commersonii

Key Differences

• Centric diatom is Not Evaluated while Commerson s Dolphin is Least Concern.

Taxonomic Classification

Rank	Centric diatom	Commerson s Dolphin
Kingdom	Chromista (Chromista)	Animalia (Animals)
Phylum	Ochrophyta (Ochrophyta)	Chordata (Chordates)
Class	Bacillariophyceae (Bacillariophyceae)	Mammalia (Mammals)
Order	Thalassiosirales (Thalassiosirales)	Cetacea (Whales & Dolphins)
Family	Skeletonemaceae	Delphinidae (Oceanic Dolphins)
Genus	Skeletonema	Cephalorhynchus
Species	Skeletonema subsalsum	Cephalorhynchus commersonii

Conservation Status

Centric diatom

NE — Not Evaluated

Commerson s Dolphin

LC — Least Concern

Physical Characteristics

Attribute	Centric diatom	Commerson s Dolphin
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Centric diatom

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Found across Europe (7 countries) and North America (United States).

Commerson s Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Centric diatom

The Centric Diatom (Skeletonema subsalsum) is a species in the genus Skeletonema. Found across Europe (7 countries) and North America (United States).

Commerson s Dolphin

<em>Cephalorhynchus commersonii</em>, commonly known as Commerson's Dolphin, is a small cetacean in the family Delphinidae. This species is classified as Least Concern on the IUCN Red List and is notable for its striking black-and-white coloration, which makes it one of the most visually distinctive dolphin species. Commerson's Dolphins typically inhabit coastal and nearshore marine environments of the Southern Hemisphere, particularly around the Falkland Islands, the southern tip of South America, and a geographically isolated population near the Kerguelen Islands in the Indian Ocean. These dolphins are highly social animals, often observed in small groups engaging in acrobatic behaviors near the surface. They typically feed on fish, squid, and crustaceans, often hunting cooperatively in shallow waters and kelp beds. Their average lifespan is approximately 18 years, and they are known for their fast, energetic swimming. Commerson's Dolphins are sometimes caught as bycatch in fishing nets, posing a localized conservation concern despite their overall Least Concern status.