According to Scott Michael:
Genus Belonepterygion (Spiny Basslets)
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"Until recently, this genus was placed in the Family Acanthoclinidae along with three other genera. But after extensive study, Mooi(1993) lowered this family to the subfamily status within the Plesiopidae. Most members of that subfamily Acanthoclininae are residents of the temperate waters around New Zealand. But there are four species, representing two different genera, known to occur on coral reefs. I have encountered one of these, the Banded Spiny Basslet (Belonepterygion fasciolatum), in aquarium stores. All of the members of this subfamily are very reclusive and are seldom seen by divers. They are a rare commodity in the marine fish trade.
The Banded Spiny Basslet is brown with narrow, dark bars on its body, orange on the lower part of the head and a white stripe from the eye to the pectoral fin. In some specimens, the dorsal and anal fin are bright red or orange. This species is known from Australia to southern Japan and attains a maximum length of 5 cm (2 in.). It is an extremely cryptic species that is not suitable for most aquariums because of its secretive nature. For example, I placed two Banded Spiny Basslets in different aquariums, both of which were medium-sized and contained numerous pieces of live rock. I never saw them again, while I located the other one by accident when I removed a piece of live rock in which it was hiding. It was in good condition and had apparently been feeding on small creatures associated with the live rock. If you do find one of these attractive little fish and decide to purchase it, you should place it in a smaller (e.g. 10 gallon) species tank (i.e. a tank devoted to only this fish) with several smaller pieces of live rock for it to hide among. Place a red incadescent bulb or low wattage "moon light" over the tank at night, when all the other lights are off and you may be able to observe it slinking around the tank decor. You may even see it dart out to snatch a passing morsel at feeding time."
But you already knew that. :wink:
mario