Abstract
Bony cranial projections and color patterns in Pentaceros japonicus Döderlein of various stages of growth were studied.In the jevenile.bony cranial projections were well developed and cloud-shaped markings were found on the side of body.Both the projections and markings disappeared by the time the fish attains 94.0 mm in standard length.but the markings remained in the specimen of Shiriya collected in a floating seaweed.
This species seems to shift the habitat from surface layers to deeper water at the stage when the projections and markings disappear.
