Monocentris japonicus is a pinecone fish of the family Monocentridae, found in the tropical Indo-West Pacific oceans, at depths of between 2 and 100m and can be found on both rocky and coral reefs. It grows to around 17cm ,this fish is encased with large scales and it has a light producing organ on the side of its lower jaw the purpose of with is not known. Many theorize that it helps it to see at night or to attract prey. The light from this organ is produced by luminescent bacteria. The pinecone fish feeds at night on small invertebrates.
Pine cone fish are often kept by aquarists because they are nonaggressive and easy to keep. In aquariums they are usually fed fresh marine foods or brine shrimp.
- "Monocentris japonica". Integrated Taxonomic Information System. Retrieved 18 April 2006.
- Froese, Rainer and Pauly, Daniel, eds. (2006). "Monocentris japonica" in FishBase. January 2006 version.
- Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982) ISBN 0-00-216987-8
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