Bagre Catfish

The Gafftopsail Catfish, often referred to simply as the Bagre Catfish, is a marine and estuarine species found along the Atlantic coast of the Americas from the northeastern United States through the Gulf of Mexico to South America. Named for the long, sail-like extension trailing from its dorsal fin, it is a common catch in coastal waters and a familiar sight to anglers working sandy or muddy bottoms near shore. Like other sea catfish, males are mouthbrooders, carrying fertilized eggs and later newly hatched young in their mouths for weeks without feeding, an unusual and demanding form of paternal care among fish. Its sleek, silvery coloration distinguishes it from the darker, more robust hardhead catfish with which it often shares habitat.

• Tall, triangular dorsal fin with a long trailing filament ('gafftopsail')
• Silvery-blue to grey back fading to a white or cream belly
• Deeply forked tail fin
• Single pair of long barbels at the corners of the mouth (fewer than hardhead catfish)
• Smooth, scaleless skin with a sharp, mildly venomous pectoral spine
• Similar species: Hardhead Catfish (Ariopsis felis) is duskier, lacks the long dorsal filament, and has more barbels.

Bagre Catfish (Gafftopsail Catfish) inhabit coastal marine and brackish waters along the western Atlantic, from the mid-Atlantic United States through the Gulf of Mexico and south to Argentina. They favor sandy or muddy bottoms in bays, estuaries, river mouths, and nearshore surf zones, often entering brackish estuarine water where salinity fluctuates with tides and freshwater inflow. Juveniles and adults may move seasonally, shifting into deeper offshore water during colder months and returning to shallow coastal and estuarine habitats as temperatures warm.

Gafftopsail Catfish are active predators feeding on small fish, shrimp, crabs, and other invertebrates found over soft coastal bottoms, often foraging in loose aggregations. Their most notable behavior is paternal mouthbrooding: males collect fertilized eggs and hold them in their mouths for several weeks through hatching and early development, forgoing feeding for the duration to protect the offspring. This intensive parental investment results in relatively low numbers of large, well-developed young compared to broadcast-spawning marine fish. They are commonly caught incidentally by anglers targeting other coastal species and are generally handled carefully due to a sharp, mildly venomous pectoral spine.