How to Identify Ozark Minnow

To identify Ozark Minnow (Notropis ozarcanus), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Generally silvery to light olive-brown dorsally, fading to silvery-white ventrally. A faint to prominent dusky lateral stripe extends from the operculum to the caudal fin base. Fins are typically clear to slightly dusky. Breeding males may exhibit a yellowish wash on the fins and body.

Scale type

cycloid

Mouth position

subterminal

Distinctive features

Slender body, Relatively pointed snout, Faint to prominent dusky lateral stripe, Small, subterminal mouth

Dorsal fin

Typically 8 rays, originating slightly behind the pelvic fin origin.

Tail fin

Moderately forked.

Pectoral fin

13-16 rays, relatively short.

Distinctive fins

No spines in any fins.

Identification Tips

1. 1

   Body Shape and Size

   Look for a slender, elongated body, typically reaching 5-8 cm (2-3 inches) in total length. Maximum recorded size is around 10 cm (4 inches).

2. 2

   Coloration and Lateral Stripe

   Observe the silvery body with a dusky lateral stripe. This stripe can be faint or quite distinct, extending from the gill cover to the tail base. The back is usually darker, olive to brownish.

3. 3

   Snout and Mouth

   Note the relatively pointed snout and the small, subterminal mouth, meaning the mouth opens slightly below the tip of the snout.

4. 4

   Fin Ray Counts

   Accurate identification often requires fin ray counts: typically 8 dorsal rays and 13-16 pectoral rays. This usually requires close examination, often in a laboratory setting for definitive identification.

5. 5

   Pharyngeal Teeth

   The pharyngeal teeth formula is typically 1,4-4,1 or 2,4-4,2, which is a key diagnostic feature for minnows but requires dissection.

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