Ruby cardinalfish
Apogon coccineus
- Usual depth1–21 m
- Water temperature17–30 °C
- Best monthsMay and November
- How commonOccasional
About this species
Apogon is a large genus of fish in the family Apogonidae, the cardinalfishes. They are among the most common fish on coral reefs. Over 200 species have been classified in genus Apogon as members of several subgenera. Some of these subgenera, such as Ostorhinchus, have been elevated to genus status, leaving just over 50 species in the genus.
Text from the Wikipedia article “Apogon”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
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Best months
Worldwide (open data)
- January: 11 records
- February: 10 records
- March: 22 records
- April: 30 records
- May: 71 records
- June: 41 records
- July: 23 records
- August: 25 records
- September: 28 records
- October: 26 records
- November: 47 records
- December: 20 records
Depth and water temperature
Depth
Mostly recorded at 1–21 m · Deepest record: 71 m
Water temperature
Recorded in surface water of 17–30 °C
Names and classification
- English
- Ruby cardinalfish, Cryptic Cardinalfish, Red Cardinal, ruby cardinal, ruby cardinalfish
Names in 3 more languages
- Japanese
- コミナトテンジクダイ
- Thai
- ปลาอมไข่ทับทิม
- Simplified Chinese
- 大目側仔, 大面側仔, 透明紅天竺鯛
Other scientific names: Apogon kominatoensis
Similar species
Cryptic CardinalfishApogon erythrinus
Obliquebanded cardinalfishApogon semiornatus
- Little Red Cardinalfish
Apogon crassiceps
- Flame Cardinalfish
Apogon doryssa
- Little Tailband Cardinalfish
Apogon caudicinctus
Sources and credits
Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).
- Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
- Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
- Conservation status as published by GBIF (IUCN Red List).
- 746 open-data records from 1838 to 2014.
- Species data updated October 26, 2026.
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