English: Northern cavefish; Trout-perch and its allies.
Synonym: Percopsida; Salmopercae; Salmopercoidea; Heteropygii.
Members: 10 species; 7 genera, 5 monotypic; 3 families.
Region: North America.
Habitat: freshwater.
ZoologyFish; ray-finned.
Ray-finned fishes; characteristics of their internal anatomy; different species may appear quite different externally.
Genera: 7; 11 species; 3 families.
Size: small; 5 to 20 cm.
Families • Amblyopsidae; Cavefishes.
• Aphredoderidae: Pirate perch.
• Percopsidae: Trout-perches.
TaxonomyPercopsiformes are grouped together because of technical characteristics of their internal anatomy, quite different externally.