rivulus

9.9

A small tropical freshwater fish often kept in aquariums that can act as both male and female

noun
/ˈrɪv.jə.ləs/

Specialized

: rivulus

The aquarium enthusiast added a rivulus to his collection for its unique reproductive behavior.

Examples

Several species of rivulus are known for their ability to survive in low-oxygen environments.
Researchers studied the adaptation of rivulus in seasonal ponds of South America.
The rivulus swam gracefully in the aquarium.
I saw a rivulus at the pet store yesterday.
Researchers studied the adaptation of rivulus in seasonal ponds of South America.
Several species of rivulus are known for their ability to survive in low-oxygen environments.
The aquarium enthusiast added a rivulus to his collection for its unique reproductive behavior.

Synonyms

Rivulus

vsrivulus

Specialized

1 9.9

A small freshwater fish from the Americas often kept in aquariums

gives extra scientific and biological detail, mentioning modern genus name and hermaphroditism

Surface Forms

rivulus singular

rivuli plural

Etymology

Rivulus comes from the Latin rivus meaning 'stream' plus the small ending -ulus meaning 'little', so it literally means 'little stream' and you can see the same idea in the English word rivulet. That's why a rivulus is a small freshwater fish often found in tiny streams and ponds.