FISH ATLASGLOBAL FISH ENCYCLOPEDIA

FISH SPECIES

Catfish

Catfish are members of the order Siluriformes, a diverse lineage found mainly in freshwater but also represented in marine environments. Their common name covers thousands of species rather than one familiar body shape.

FISH ATLAS / FIELD GUIDECatfishIN THIS CHAPTER01 / Characteristics02 / Lifestyle03 / Species04 / Field notes
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01 / NATURAL HISTORY

Characteristics

Barbels around the mouth are a well-known feature, although their number and form vary. Many catfish also have prominent fin spines, sensory adaptations and skin that is naked or covered with bony plates instead of typical scales.

  • 01Armored catfish
  • 02Air-breathing catfish
  • 03Electric catfish
Hemibagrus hainanensis 的物种图片
Catfish

02 / LIFESTYLE

Lifestyle

Catfish rely heavily on non-visual sensory systems to map murky or benthic environments. Highly sensitive chemosensory barbels and electroreceptors across the head detect chemical plumes and prey vibrations in sediment. While many species rest secluded beneath undercut banks or wood tangles by day, their foraging spans specialized predation, wood-scraping detritivory and active nocturnal hunting.

OBSERVATION INDEX

  1. Chemosensory barbel tracking
  2. Shelter beneath wood and banks
  3. Benthic substrate probing

03 / SPECIES

Representative species

View all species

Discover representative species illustrating the ecological diversity, morphologies and adaptations of this group.

04 / FIELD NOTES

A closer look

What are a catfish's whiskers used for?

Known as barbels, these flexible appendages are covered with thousands of sensory taste buds and tactile nerve endings, enabling catfish to detect chemical trails and buried prey in murky waters.

Are all catfish bottom scavengers?

No. While many forage along the substrate, catfish diversity includes active surface predators, wood-grazing armored species, pelagic schoolers and specialized fruit eaters.

Why are punctures from catfish fin spines so painful?

The leading rays of their dorsal and pectoral fins form rigid spines that often possess serrated edges and glandular venom coatings that trigger severe inflammatory reactions.