Fishing Ontario Canada


Distribution in the area:

Jamieson Lake, Jimmies Lake, Ledyard Lake, Mink Lake,


Semotilus, from the Greek, sema, "banner"; and the second part meant to mean "spotted"
margarita, from the Greek, "pearl"
Common name
Other common names include: Nachtrieb Dace, Northern Dace, Northern Pearl Dace, Northern Minnow


Kingdom Animalia
Phylum Chordata, animals with a spinal chord
Subphylum Vertebrata, animals with a backbone
Superclass Osteichthyes, bony fishes
Class Actinopterygii, ray-finned and spiny rayed fishes
Subclass Neopterygii
Infraclass Teleostei
Superorder Ostariophysi
Order Cypriniformes, minnows and suckers
Family Cyprinidae, carps and minnows
Genus Semotilus, the creek chubs
Minnesota Pearl Dace are of the subspecies Semotilus margarita nachtriebi, named after Professor Henry Nachtrieb, of the University of Minnesota and former director of the Minnesota Zoological Survey.
Also known as Margariscus margarita


A stout-bodied, cold water minnow.


up to 6", 3"-4" average


dusky mottled on the upper sides (many of the scale pockets on the sides are darkened, giving the mottled appearance) silver grey to white on the lower sides
white belly usually a dark spot near the base of the tail dark lateral band is distinct on the young, but fades in adults adult males have orange-red sides below the lateral band females may also show some color during spawning


elongated form, nearly cylindrical in cross section usually complete lateral line of 62-78 scales dorsal, anal, and pelvic fins of 8 rays pectoral fins of 15/16 rays


mouth terminal, nearly horizontal with the upper jaw, separated from the snout by a groove
small barbel in the groove of the upper jaw (occasionally lacking)
hooked pharyngeal teeth in a 2, 5-4, 2 pattern, but count is variable.
During the breeding season, males have a pink to red-tinted stripe along their lower sides, and the upper sides of the pectoral fins bear paired rows of small, sharp tubercles.


Cool bogs, ponds, lakes, creeks, and clear streams.
Cool, boggy waters of lakes and ponds and in the cold headwater streams often associated with trout.


Feeds on algae, aquatic insects, free-floating animal plankton, and a variety of other small aquatic organisms.
A forage fish for larger sport fishes in some waters.


Spawns in late spring to early summer, in clear water at 13-25°C, with a weak to moderate current, over sand or gravel streams. No nest is built, but the small spawning area is guarded by the male. Mature in 1 year
Fecundity is 900-2,140 eggs per female