Pine Cone Fish - Monocentris japonicaPine Cone Fish (Monocentris japonica) The Pine Cone Fish, also commonly known as the Japanese Pineapplefish or Pineconefish, is one of the most unusual marine fish kept in captivity. It has a bright yellow body covered in large bony scutes outlined in black, along with glowing light organs on either side of the lower jaw that house symbiotic bacteria. In the wild it is a nocturnal, cave loving species that shelters under ledges and among rocky reefs