How to Identify Flathead Catfish

To identify Flathead Catfish (Pylodictis olivaris), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Variable, typically mottled yellow, brown, or olive green on the back and sides, fading to a creamy white or yellow belly. Younger fish often have more distinct dark blotches.

Scale type

none

Mouth position

superior

Distinctive features

Broad, flattened head, Small eyes located dorsally, Protruding lower jaw, Absence of scales, Adipose fin present, Four pairs of barbels around the mouth

Dorsal fin

Single, short-based dorsal fin with a strong, serrated spine and 6-7 soft rays. The spine can inflict a painful wound.

Tail fin

Slightly notched or rounded caudal fin, not deeply forked like Channel Catfish.

Pectoral fin

Large, fan-like pectoral fins, each with a strong, serrated spine.

Distinctive fins

The adipose fin is relatively small and rounded. The anal fin is short-based with 14-17 rays.

Identification Tips

1. 1

   Head Shape

   Look for the distinctly broad and flattened head, which is wider than it is deep.

2. 2

   Lower Jaw

   The lower jaw protrudes noticeably beyond the upper jaw, giving it an 'underbite' appearance.

3. 3

   Tail Fin

   The caudal fin is either slightly notched or rounded, never deeply forked like a Channel Catfish.

4. 4

   Coloration

   Mottled brown, yellow, or olive green body with a pale belly. Young fish often have more pronounced dark blotches.

5. 5

   Eyes

   Relatively small eyes positioned dorsally on the head.

Explore Flathead Catfish