Appearance
''E. variatum'' is large in size for its family; it has an average length of between two and a half to three and a half inches . It has a wide variety of markings. There is a red-orange band on its dorsal fin, which is followed by a blue-green band and a red-brown band at the edge of the fin. There are also red spots located on its other fins.This darter has large pectoral fins, which are used to keep the fish upright in the fast-moving streams it inhabits. It also has four to six saddles along its back. Three to four of these saddles tend to be dark and visible while the remaining saddles are not.
Status
The population trend of this fish seems to be stable and it is a common species with numerous sub-populations over a wide range, and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".Habitat
''E. variatum'' lives in small and medium rivers and streams. They tend to live within riffles that contain small rocks. The darter will tend to live in the fastest flowing riffles. In order to survive, it needs rivers and streams with high water quality. Due to this attribute, the fish is often viewed as an indicator of good water quality.The darter lives predominately in the states of Ohio, New York, Pennsylvania, Indiana, West Virginia and Kentucky. It has also been found within Virginia, although only rarely.
Reproduction
During the early spring, males establish spawning territory, which will occur from April to May. After spawning, the eggs are laid in riffles by females, who will bury them with pebbles. After the eggs are buried, they are abandoned by the parents.Food
The diet of ''E. variatum'' consists of crustaceans, insect larvae and other aquatic invertebrates.References:
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