| Family | Scientific Name | Author | Year | Common Name |
| Polymixiidae | Polymixia nobilis | Lowe | 1838 | Stout Beardfish |
All Polymixia — Snout rounded and prominent. Mouth extending to posterior margin of eye; 2 supramaxillae. Teeth villiform, in bands on jaws, vomer, palatines, ectopterygoids, and endopterygoids (roof of the mouth). Pair of long chin barbels originating from hyoid, behind symphysis of lower jaw. Seven branchiostegal rays, first 3 minuscule, supporting the hyoid barbel, only last 4 externally visible.
Polymixia nobilis
Unique Characters: Dorsal-fin soft rays 34-38. Total number of gill rakers on first arch 10-13.
Similar Species: Beardfish Polymixia lowei. Dorsal-fin soft rays 26-32. Total number of gill rakers on first arch 14-22.
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