This is perhaps the most gorgeous of all
the groupers. The colouration of this fish both in range and tone of colour is almost
identical to the totally unrelated Powder-blue-Surgeon-fish (Acanthurus leucosternon). It
is interesting to seculate why two fishes of enormously different habitat should have
similar colouration. The grouper is a territorial lurking animal which is fond of caves
and highly predatory, and the surgeonfish is an open water, shoalling fish, feeding on
algae and macroplankton. Whatever the reason, the lucky owner of this grouper must surely
rejoice at the generosity of nature in producing two fishes of such exquisite colouration.
As with other groupers, new fishes to the aquarium should be allowed two or three days
to familiarise themselves with their new environment before feeding is attempted. After
this time their fear of their owner and the new territory will have been overcome by the
pangs of hunger and, on offering sizeable chunks of fresh protein, the owner will be
rewarded by the usual grouper-lunge as the fish spots the descending piece of meat and,
with unbelievable speed, rushes from its lair. The groupers may be kept in a community
with other coral fishes, provided that all the other fishes are at least as large as the
grouper and preferably larger.