Percomorpha

Trachiniformes is an order of percomorph bony fish, whose contents are traditionally placed in suborder Trachinoidei of Perciformes.

The Gobioidei are a suborder of percomorph fish. Many of these fishes are called gobies. It is by far the largest and most diverse order within the order Gobiiformes, and one of the most diverse groups of ray-finned fish in general.

Acanthuriformes is a large, diverse order of mostly marine ray-finned fishes, part of the Percomorpha clade. In the past, members of this clade were placed in the suborders Acanthuroidea and Percoidea of the order Perciformes, but this treatment is now considered paraphyletic.

Percomorpha () is an extremely large and diverse clade of ray-finned fish. With more than 17,000 known species (including tuna, seahorses, gobies, cichlids, flatfish, wrasse, perches, anglerfish, and pufferfish) known from both marine and freshwater ecosystems, it is the most speciose clade of extant vertebrates.

Ovalentaria is a clade of ray-finned fishes within the Percomorpha, referred to as a subseries. It is made up of a group of fish families which are referred to in ''Fishes of the World's fifth edition as incertae sedis, as well as the orders Mugiliformes, Cichliformes, and Blenniiformes. It was named by W. L. Smith and T. J. Near in Wainwright et al.'' (2012) based on a molecular phylogeny, but the authors suggested that the group was united by the presence of demersal eggs that are attached to a substrate. Some authors have used the ordinal name Stiassnyiformes for a clade including Mugiloide

Labriformes is an order of ray-finned fishes within the clade Percomorpha. Some authors include the Labriformes as the clade Labroidei within the Perciformes while others include more families within the Labriformes, such as the cichlids and damselfishes. This order was previously restricted to wrasses, parrotfishes, cales, and their close relatives, but most recent studies suggest that the Labriformes also contains highly aberrant groups such as the stargazers and sand lances, which are placed in their own suborder. Almost all members of this order are marine, with the only exception being th