Japanese Pineconefish/Pineapplefish Monocentris japonica

Japanese Pineconfish
Japanese Pineconfish
Japanese Pineconfish
The terminology of the pineconefish and pineapplefish is somewhat confusing. There are two genera often called "pineconefish", one containing only the (Australian) Pineapplefish (see below) and one containing four species of Pineconefish: Diamond, Maori, Reed's and the one shown here which is often called the Japanese Pineapplefish!
The Japanese Pineapplefish is native to rocky and coral reefs of the Indo-west Pacific (Africa to Japan/New Zealand). It is nocturnal and usually favours deep waters. It is yellow or whitish with black scale borders and, in common with other pineconefish, has hard scales (scutes) providing full body armour, has a first dorsal fin of long, sharp spines and has a light organ on the chin lit by bioluminescent bacteria. It grows to 17cm long.
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Pineapplefish Cleidopus gloriamaris

Pineapplefish
Pineapplefish
Pineapplefish
The Pineapplefish is native to deep coastal waters and reefs off eastern and western Australia. It looks a little similar to the pineconefishes with a yellow or yellowish body with dark-edged hard, spiny scutes, but is a little larger, growing to 22cm, and has a differently-shaped snout. It has a small red line on the chin by the bioluminescent area. The photos above showing the bioluminescence were taken in dark water and lightened only by post-processing.
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