Until recently, S. splendidus is one of only two animal species are known to have a blue color because the pigment provider, the other is closely related to LSD-fish (S. picturatus). The name "cyanophore" proposed for blue chromatophores, or pigment-containing and light-reflecting cells. In all other known cases, the blue color comes from the disruption of thin-film stacks of purine crystals flat, thin and reflect.
Mandarinfish are reef dwellers, preferring sheltered lagoons and inshore reefs. While they are moving slowly and is quite common in their range, they are not easily visible because the bottom of their eating habits and small size (only reach about 6 cm). They feed mainly on small crustaceans and other invertebrates.
Based on the analysis of wild fish intestine 7 Sadovy et al. (2001) determined that mandarinfish had mixed diet consisting of harpacticoid copepods, polychaete worms, small gastropods, amphipods gammaridean, eggs, fish and ostracods. In the wild, eating constantly during the day, selectively peck at small fish prey trapped in a stable substrate in a variety of home square meter lot.
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