Lake Chub, Couesius plumbeus





The lake chub has a silvery appearance, darker on its back, lighter sides, with a white or cream belly.  The head is shorter and more rounded than that of the pearl dace, and the dorsal fin is set almost directly over pelvic fins.  The lake chub has a barbel that is terminal and slender, at or near end of maxillary. The dark gray lateral line is complete having 53 - 70 scales.  The average size is 4 inches but has been found to grow to 6 inches.



The lake chub is common in lakes, brooks, and rivers where it prefers gravel substrates.  The main food of the lake chub is insect larvae but will also eat plankton and algae. The lake chub spawn in the spring usually April - May. They migrate in schools to streams where they scatter their eggs over a rocky or gravel substrate.  Breeding males develop nuptial tubercles on their heads, and reddish patches at the base of its pectoral and pelvic fins.  Lake chub are likely food for larger fish such as trout and smallmouth bass, and fishing eating birds.