| Family | Scientific Name | Author | Year | Common Name |
| Percidae | Etheostoma perlongum | (Hubbs and Raney) | 1946 | Waccamaw Darter |
Etheostoma perlongum
Unique Characteristics: Belly and interpelvic area lacking modified scales. Lateral line normal, not arched upward. 1st anal spine flexible, as thin as 2nd anal spine; anal fin rays 8 or 9 (7-10). Gill membranes narrowly joined, 55-75°. Lateral line scales 60-62 (58-66). Nape and cheek well scaled. Restricted to the Waccamaw basin.
Similar Species:
Tessellated Darter Etheostoma olmstedi. Belly and interpelvic area lacking modified scales. Lateral line normal, not arched upward. Gill membranes narrowly joined, 55-75°. 1st anal spine flexible, as thin as 2nd anal spine (anal spine 1 east of Cape Fear basin); anal rays 7 or 8 (7-10). Lateral line scales 43-54. Nape and cheek naked or poorly scaled. Caudal fin emarginate or truncate. Infraorbital canal normally complete.
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