The
Perciformes, also called the
Percomorphi or
Acanthopteri, include about 40% of all bony
fish and are the largest order of
vertebrates. The name
Perciformes means
perch-like. They belong to the
ray-finned fish and comprise over 7000 different species, with varying shapes and sizes, found in almost all aquatic environments. They are also the most variably sized order of vertebrates, ranging from the 7mm (0.3 in)
Schindleria brevipinguis to the 5m (16.5 ft) large
Makaira species. They first appeared and diversified in the Late
Cretaceous.
Perciform fish typically have
dorsal and
anal fins divided into anterior
spiny and posterior soft-rayed portions, which may be partially or completely separated. There are usually
pelvic fins with one spine and up to five soft rays, either positioned by the throat or under the belly. Scales are usually
ctenoid in form, though sometimes they are
cycloid or otherwise modified. Various other, more technical characters define the group.
Classification is controversial. As traditionally defined the Perciformes are almost certainly paraphyletic. Other orders that should possibly be included as suborders are the Scorpaeniformes, Tetraodontiformes, and Pleuronectiformes. Of the presently recognized suborders several may be paraphyletic as well.
Families
These are grouped by suborder/superfamily, generally following Fishes of the World.
References