How to Identify Ozark Cavefish

To identify Ozark Cavefish (Amblyopsis rosae), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Pinkish-white to translucent, lacking pigmentation.

Scale type

none

Mouth position

superior

Distinctive features

Absence of external eyes (eyes are vestigial and covered by skin), Lack of pigmentation (albino-like appearance), Prominent sensory papillae on the head and body, forming an extensive lateral line system, Small, slender body, Large mouth relative to head size

Dorsal fin

Single, short-based dorsal fin located posteriorly.

Tail fin

Rounded caudal fin.

Pectoral fin

Small, rounded pectoral fins.

Distinctive fins

Pelvic fins are absent. All fins are unpigmented.

Identification Tips

1. 1

   Eyes

   Completely blind; eyes are vestigial and covered by skin, appearing as small, dark spots beneath the surface.

2. 2

   Coloration

   Distinctive pinkish-white or translucent body due to lack of pigmentation.

3. 3

   Sensory Papillae

   Numerous, highly developed sensory papillae are visible on the head and body, especially around the mouth and lateral line, aiding in chemoreception and mechanoreception.

4. 4

   Size

   Small fish, typically reaching a maximum standard length of 5-7 cm (2-2.8 inches).

5. 5

   Pelvic Fins

   Absence of pelvic fins is a key diagnostic feature for this species and genus.

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