blue whale vs Ocean Sunfish

Balaenoptera musculus compared with Mola mola

Key Differences

• blue whale is carnivore while Ocean Sunfish is omnivore.
• blue whale is 150.0x heavier than Ocean Sunfish.
• blue whale lives longer (90 years vs 10 years).

Taxonomic Classification

Rank	blue whale	Ocean Sunfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Actinopterygii (Ray-finned Fish)
Order	Cetacea (Whales & Dolphins)	Perciformes (Perch-like Fish)
Family	Balaenopteridae (Rorquals)	Scombridae (Tunas & Mackerels)
Genus	Balaenoptera (Rorquals)	Thunnus (Tunas)
Species	Balaenoptera musculus	Mola mola

Evolutionary Relationship

blue whale and Ocean Sunfish share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Ocean Sunfish

VU — Vulnerable

Trend: Decreasing ↓

Physical Characteristics

Attribute	blue whale	Ocean Sunfish
Diet	Carnivore	Omnivore
Average Lifespan	90 years	10 years
Average Length	30.0 m	2.7 m
Average Weight	150.0 t	1.0 t

Habitat & Geographic Range

blue whale

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Ocean Sunfish

Habitat

Typically found in a wide range of habitat types.

Range

Distributed across Australia, Japan, South Africa, and United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

blue whale

The largest animal ever known to have lived on Earth, blue whales can reach 33 meters and 200 tonnes — their hearts alone weigh as much as a small car. Found in all oceans, they migrate between polar feeding grounds and tropical breeding areas. Filter feeders consuming up to 4 tonnes of krill daily. Endangered, with global populations estimated at 10,000–25,000 after near-extinction from 20th-century whaling.

Ocean Sunfish

The ocean sunfish is the heaviest known bony fish in the world, weighing up to 2,300 kg.