Percopsidae

Taxobox
name = Percopsiformes

---

image_caption = "Amblyopsis spelaeus"
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Percopsiformes
familia = Percopsidae
genus = "Percopsis"
genus_authority = Agassiz, 1849
subdivision_ranks = species and genera
subdivision = †"Amphiplaga" †"Libotonius" "Percopsis" "P. omiscomaycus" "P. transmontana"

Percopsidae is a family of fish in the order Percopsiformes. Its living members are two North American fresh water species of the genus "Percopsis", trout-perch "Percopsis omiscomaycus" (Walbaum 1792) and sand roller "Percopsis transmontana" (Eigenmann & Eigenmann 1892).

Trout-perch

Trout perch are silvery-transparent in appearance. Specimens found in the US range from 76-102 mm while ones found in Canada can get as big as 152 mm. These fish live 3-4 years in shallow lakes and streams, hiding among rocks. They survive on chironomids, ephemeropterans, amphipods, and small fish.

and roller

Similar in appearance to trout-perch, although shorter and stubbier, sand rollers grow up to 9.6 cm and live up to 6 years in slow-moving, sandy-bottomed streams and rivers among vegetation. Their diet includes Diptera and Trichoptera, although juveniles also have been known to eat crustacean zooplankton.

References

* [http://www.fisheries.org/AFSmontana/SSCpages/Trout-perch.htm Trout-perch article by Robert G. Bramblett]
* [http://filaman.ifm-geomar.de/Summary/SpeciesSummary.php?id=3066 Species summary Percopsis transmontana Sand roller]
* [http://animaldiversity.ummz.umich.edu/site/accounts/pictures/Percopsidae.html Pictures - University of Michigan]