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Definition of pajama cardinalfish
pajama cardinalfish
(UK: pyjama cardinalfish)
Plural:pajama cardinalfish
pajama cardinalfish Lexical Profile
CEFR
C1
Grade
8
Tier
3
Usage
Rare
• noun
1
A small, brightly colored marine fish native to coral reefs in the western Pacific Ocean, characterized by a greenish-yellow face, a dark vertical band, and reddish-brown spots on its rear half that resemble polka-dot pajamas.
Example
"Because of its peaceful nature and hardiness, the pajama cardinalfish is highly recommended for beginner saltwater aquarium hobbyists."
• Nearby Words
Word Origin & Etymology
The common name derives from the fish's distinctively spotted rear half, which closely resembles polka-dot pajamas, combined with 'cardinalfish', a family of marine fish (Apogonidae) often noted for deep red coloration or prominent fins.
Cite this Entry
Wordmom. (2026). Definition of Pajama cardinalfish. In Wordmom Dictionary. Retrieved Oct 13, 2026, from https://wordmom.com/dictionary/pajama cardinalfish