Banded eagle ray vs

Aetomylaeus nichofii compared with Colacium sideropus

Key Differences

• Banded eagle ray is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	Banded eagle ray
Kingdom	Animalia (Animals)	Protozoa (protozoa)
Phylum	Chordata (Chordates)	Euglenozoa (Euglenozoa)
Class	Elasmobranchii	Euglenoidea (Euglenoidea)
Order	Myliobatiformes (Myliobatiformes)	Euglenida (Euglenida)
Family	Myliobatidae	Euglenaceae
Genus	Aetomylaeus	Colacium
Species	Aetomylaeus nichofii	Colacium sideropus

Conservation Status

Banded eagle ray

VU — Vulnerable

NE — Not Evaluated

Physical Characteristics

Attribute	Banded eagle ray
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Banded eagle ray

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

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

Habitat

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

Range

Distributed across Brazil and Sweden.

Banded eagle ray

The Banded eagle ray (Aetomylaeus nichofii) is a species in the genus Aetomylaeus. It is currently classified as Vulnerable on the IUCN Red List. Native to Asia, inhabiting ecosystems characteristic of the region.

Colacium sideropus is a microscopic euglenoid protist belonging to the family Euglenaceae, characterized by its sessile, colonial lifestyle attaching to aquatic invertebrates and zooplankton. Members of the genus Colacium are distinguished from free-swimming euglenoids by their stalked or clustered growth form, anchoring to the bodies of crustaceans such as copepods and cladocerans in freshwater environments. Like other photosynthetic euglenoids, Colacium possesses chloroplasts derived from secondary endosymbiosis with a green alga, allowing it to perform photosynthesis under favorable light conditions. The relationship with host invertebrates is generally considered epibiotic rather than parasitic, with the protist colonizing the external surfaces of its host without causing significant harm. Colacium sideropus occurs in freshwater lakes, ponds, and slow-moving streams where its zooplankton hosts are abundant. Its ecological role includes contributing to microbial food webs and nutrient cycling within freshwater ecosystems. As with many microscopic protists, its true distribution and abundance are difficult to assess from macroscopic surveys, and it is likely globally distributed wherever suitable hosts exist in freshwater habitats.