How to Identify a Longnose Gar (Lepisosteus osseus)
Quick answer
Longnose Gar, Lepisosteus osseus: the 5 field marks to check, size, habitat and North American range, with sources. How to tell it from Alligator Gar and Bowfin.
Updated 2026-09-10 · Sources: Missouri Dept. of Conservation, Wikipedia, ncfishes.com
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Download on the App StoreWhat are the key facts?
- Scientific name: Lepisosteus osseus
- Family: Lepisosteidae (Gar)
- Adult size: Commonly to 3 feet, with weight of 5-6 pounds; the largest recorded in Missouri are about 60 inches and 30 pounds.
- Habitat: Typically inhabits the sluggish pools, backwaters, and oxbows along large, moderately clear streams; it also thrives in artificial impoundments.
- Range in North America: Widely distributed across the eastern half of the United States, ranging as far west as Kansas, Texas, and southern New Mexico — it is the only gar species found in New Mexico (this entry falls back to a Wikipedia source; no official-agency page giving an equally complete North American range description could be found).
Key marks to check on a Longnose Gar
- Snout shape: The longnose gar is named for its distinctively long, narrow snout: the least width of the snout goes about 15 to 20 times into its length.
- Teeth: Large teeth on the upper jaw are arranged in single rows on each side.
- Scale type: The body is covered with hard, diamond-shaped scales.
- Coloration and markings: Brown to dark olive above, grading to white on the belly; the unpaired fins have numerous roundish black spots.
- Juvenile markings: A conspicuous black stripe runs along the midside in juveniles.
Longnose Gar vs Alligator Gar
The long, narrow snout easily separates the longnose gar from the other gars. See the Alligator Gar page for its full mark list.
Longnose Gar vs Bowfin
Gars have a long, slender body covered with armor-like ganoid scales and a long, tooth-filled snout, which the bowfin lacks. See the Bowfin page for its full mark list.
Where it lives
Typically inhabits the sluggish pools, backwaters, and oxbows along large, moderately clear streams; it also thrives in artificial impoundments. Widely distributed across the eastern half of the United States, ranging as far west as Kansas, Texas, and southern New Mexico — it is the only gar species found in New Mexico (this entry falls back to a Wikipedia source; no official-agency page giving an equally complete North American range description could be found).
How to photograph it for identification
Lay the fish flat on its side in even light and photograph the whole body first, then the details below. Get a close, sharp frame of the head: mouth, jaw length and any barbels. Photograph the gill cover and cheek straight on so the ear flap and scale rows are visible. Shoot the side of the body before the fish dries; spots and stripes fade fast out of water. The app reads the photo and names the likely species; use the marks on this page to confirm it.
Before you keep it
Size and daily limits for this species differ by state and by water, and some waters are catch-and-release only. Check the current regulations for where you are fishing before keeping any fish; if you are unsure of the species, release it.
FAQ
What does a Longnose Gar look like?
The longnose gar is named for its distinctively long, narrow snout: the least width of the snout goes about 15 to 20 times into its length. Large teeth on the upper jaw are arranged in single rows on each side.
How big does a Longnose Gar get?
Commonly to 3 feet, with weight of 5-6 pounds; the largest recorded in Missouri are about 60 inches and 30 pounds.
How do I tell a Longnose Gar from a Alligator Gar?
The long, narrow snout easily separates the longnose gar from the other gars.
Where are Longnose Gar found?
Widely distributed across the eastern half of the United States, ranging as far west as Kansas, Texas, and southern New Mexico — it is the only gar species found in New Mexico (this entry falls back to a Wikipedia source; no official-agency page giving an equally complete North American range description could be found).
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Sources
- Missouri Dept. of Conservationmdc.mo.gov/discover-nature/field-guide/longnose-gar
- Wikipediaen.wikipedia.org/wiki/Longnose_gar
- ncfishes.comncfishes.com/freshwater-fishes-of-north-carolina/lepisosteus-osseus/
Compiled by the FishLens editorial team
Every fact on this page is taken from the sources listed above; numbers and prices are copied from the source, and prices name the guide or auction and its date. Research and drafting were assisted by AI, and each claim was then checked against the cited sources. Checked 2026-09-10. We do not buy, sell or grade items; the app identifies what you photograph and points you to these references.