Do Catfish Have Fins?

Like other fish species, catfish have fins. Their fins are quite important because they help the fish stay buoyant in water and swim.

Most catfish have a cylindrical body with a flattened ventral. Catfish get their name from the whisker-like barbels on their snout, either side of their mouth, and on their chin.

Catfish Fins

The dorsal and pectoral fins of most catfish have leading spines. Catfish lack scales, which distinguishes them from the majority of other teleost fish.

Some catfish, such as plecos, have bony dermal plates that cover their skin. Except for members of the Malapteruridae (electric catfish), all catfish have a strong, hollow, bony, leading spine-like ray on their dorsal and pectoral fins.

As a defense, these spines may be locked in place and protrude outwards, allowing them to inflict devastating wounds.

These fin rays may be employed to carry a stinging protein; as many as half of all catfish species may be poisonous in this way, making the Siluriformes the vertebrate order with the greatest number of venomous species.

The glandular cells in the epidermal tissue surrounding the spines create this venom. In members of the family Plotosidae and the genus Heteropneustes, this protein is so potent that stings may be fatal to humans; in Plotosus lineatus, stings can be fatal.

The dorsal and pectoral fin spines are distinguishing traits of siluriforms that vary from those of other fish groups.

The paired pectoral fins are placed on either side, folding slightly beyond the operculum, and are homologous to tetrapod forelimbs.

Pectoral fins that help them walk. Certain pectoral fin rays, such as those seen in sea robins and flying gurnards, may be converted into finger-like extensions.

How To Raise Catfish In A Tank

Dorsal fins are found on the rear of the catfish. The dorsal fins prevent the fish from rolling and aid in quick twists and stops.

In conclusion, catfish have fins. This gives them an advantageous edge over other fish in their aquatic environment.

References

  • Lundberg, John G.; Friel, John P. (20 January 2003). “Siluriformes”. Tree of Life Web Project.
  • Arce, Mariangeles, et al. “Molecular phylogeny of thorny catfishes (Siluriformes: Doradidae).” Molecular phylogenetics and evolution 67.3 (2013): 560-577.
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