Longnose Gar

The Longnose Gar is a freshwater fish in the ancient family Lepisosteidae, native to rivers, lakes, and reservoirs across eastern and central North America, from southern Canada through the Great Lakes and Mississippi basin down to the Gulf Coast and parts of Mexico. It is easily distinguished from other North American freshwater fish by its extremely elongated, narrow, tooth-filled snout. Like other gars, it possesses a vascularized swim bladder that allows air breathing, letting it tolerate warm, low-oxygen water. Its hard, interlocking ganoid scales form a durable natural armor, a feature retained from its ancient evolutionary lineage that has changed little over tens of millions of years.

Distinguishing features of the Longnose Gar:

• Snout: extremely long and narrow, at least 10 times longer than it is wide, lined with numerous sharp needle-like teeth
• Body: slender, torpedo-shaped, and cylindrical, covered in hard diamond-shaped ganoid scales
• Coloration: olive-brown to green above, pale below, with dark spots on the rear body, dorsal, anal, and tail fins in adults
• Fin placement: single dorsal fin set far back near the tail, opposite the anal fin
• Size: typically 75-150 cm, among the largest gar species

Its markedly narrower, longer snout compared to the Alligator Gar's broader jaw is the clearest way to distinguish the two species.

Longnose Gar inhabit slow to moderately flowing rivers, natural lakes, reservoirs, and backwaters throughout eastern and central North America, ranging from the Great Lakes and St. Lawrence River south through the Mississippi drainage to the Gulf of Mexico and northeastern Mexico. They favor clear to moderately turbid water with some vegetation or woody cover, often staying near the surface in open water. Their air-breathing swim bladder allows them to tolerate warm, oxygen-poor conditions during summer months better than most native fish. They are tolerant of a wide range of habitats, from large rivers to smaller lakes and impoundments, and can withstand brackish water near coastal river mouths.

Longnose Gar are ambush predators that hover motionless near the surface or among cover before making a rapid sideways snap of the jaws to seize prey with their needle-like teeth. They periodically rise to gulp air at the surface, a visible behavior that aids identification even from a distance. Generally solitary but sometimes seen in loose aggregations, they spawn in late spring or early summer in shallow, vegetated water, where eggs are scattered and adhere to plants; the eggs are toxic to many other animals, providing some protection from predation. As a long-lived apex predator within its native range, sometimes surviving decades, the Longnose Gar plays an important role regulating smaller fish populations.