What is the name of this tropical fish?

'Synchiropus splendidus', the mandarinfish or 'mandarin dragonet', is a small, brightly colored member of the 'dragonet' family, which is popular in the saltwater aquarium trade. The mandarinfish is native to the Pacific, ranging approximately from the Ryukyu Islands south to Australia. It can usually be found in some of the warmer waters.

Despite their popularity in the aquarium trade, mandarinfish are considered difficult to keep, as their feeding habits are very specific. Some fish never adapt to aquarium life, refusing to eat anything but live amphipods and copepods (as in the wild); though individuals that do acclimatize to aquarium food are considered to be quite hardy and highly resistant to diseases due to a toxic mucous coating.

And not only is this toxic mucus coating dangerous, particularly if it makes it into a predator's open wound, but reportedly, it smells disgusting. The mandarinfish needs the smell, and the spines, because it lacks one of the most basic protective measures in the marine world: It doesn't have scales. Their bright coloration is aposematic (of coloration or markings serving to warn or repel predators).

Because of their distint aesthetic appeal, the mandarinfish appeared on a 39-kip postage stamp from Laos issued in 1987, and a 40-cent postage stamp of the Federated States of Micronesia issued on 26 August 1993.