Butterflyfishes of the family Chaetodontidae are conspicuous members of
almost all tropical reefs. These colorful fishes have attracted a great
deal of attention from both the scientific community and especially the
aquarium fish industry. At first one is tempted to say that
butterflyfishes are abundant worldwide, but the evidence does not
support this statement. The biomass of chaetodontids on reefs may range
from 0.02-0.80%, and in terms of numbers they comprise only 0.04-0.61 %
of the individuals on the reef. Yet in spite of these relatively small
numbers they have been extensively studied. A quick census shows some
170 articles on or about butterfly- fishes, with 78% of them being
published since the 1970's. Along with the cichlids and damselfishes
they might be one of the most studied and well published family of
tropical fishes. Why then have chaetodontids attracted so much
attention? The butterflyfishes are mostly shallow water inhabitants that
are approachable and easily recognizable, making their study very
feasible. Their bright coloration has provoked many hypotheses but has
posed more questions about coloration than it has provided answers. And
despite their apparent overall morphological similarity, their highly
structured and varied social systems have made them an ideal model for
such studies. The reasons for choosing these organisms are indeed as
diverse as the studies themselves.