How to Identify Inland Silverside

To identify Inland Silverside (Menidia beryllina), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Translucent to pale green or yellowish dorsally, with a distinct, broad, silvery lateral stripe extending from the operculum to the caudal fin base. The ventral side is typically silvery-white. Fins are generally clear.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Two widely separated dorsal fins (first dorsal fin with 4-7 spines, second dorsal fin with 1 spine and 8-12 soft rays)., Anal fin with 1 spine and 16-20 soft rays., Pectoral fins are relatively high on the body., Small, terminal mouth., Large eyes., Body depth typically 4.5-6.0 times in standard length., Maximum recorded length up to 15 cm (6 inches), but typically 5-10 cm (2-4 inches).

Dorsal fin

Two distinct dorsal fins; the first is spiny and short, the second is soft-rayed and longer.

Tail fin

Forked caudal fin.

Pectoral fin

Small, positioned high on the body.

Distinctive fins

Pelvic fins are small and located abdominally.

Identification Tips

1. 1

   Silvery Lateral Stripe

   The most prominent identification feature is the broad, iridescent silvery stripe running along the mid-lateral line of the body.

2. 2

   Two Dorsal Fins

   Observe the two distinctly separated dorsal fins. The first is spiny and much shorter than the second, which is soft-rayed.

3. 3

   Body Shape and Size

   Its slender, elongated, and somewhat compressed body, typically reaching 5-10 cm in length, is characteristic.

4. 4

   Mouth Position

   The small, terminal mouth is angled slightly upwards, adapted for surface feeding.

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