Article · Wikipedia archive · Last revised Jul 25, 2026

Flathead sea catfish

The flathead sea catfish is a species of catfish in the family Ariidae. It was described by Franz Steindachner in 1876, originally under the genus Arius. It inhabits rivers, estuaries, and marine waters on the Pacific coast, from Mexico to Panama, at a maximum depth of 60 m (200 ft). It reaches a maximum total length of 60 cm (24 in). It is currently ranked by the IUCN redlist as being of Least Concern, due to a lack of known major threats for the species.

Last revised
Jul 25, 2026
Read time
≈ 1 min
Length
186 w
Citations
9
Source
Flathead sea catfish
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Ariidae
Genus: Notarius
Species:
N. planiceps
Binomial name
Notarius planiceps
(Steindachner, 1876)
Synonyms1
  • Arius planiceps Steindachner, 1876
  • Ariopsis planiceps (Steindachner, 1876)
  • Netuma planiceps (Steindachner, 1876)
  • Galeichthys planiceps (Steindachner, 1876)
  • Tachisurus planiceps (Steindachner, 1876)

The flathead sea catfish2 (Notarius planiceps) is a species of catfish in the family Ariidae.3 It was described by Franz Steindachner in 1876, originally under the genus Arius.1 It inhabits rivers, estuaries, and marine waters on the Pacific coast, from Mexico to Panama, at a maximum depth of 60 m (200 ft).4 It reaches a maximum total length of 60 cm (24 in).3 It is currently ranked by the IUCN redlist as being of Least Concern, due to a lack of known major threats for the species.4

The flathead sea catfish feeds off of benthic invertebrates.5 Its meat is marketed fresh.3

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