Here's a little snap shot of what it says on wikipedia about the longnose gar
The longnose gar ranges in length from 60–182 cm (24–72 in) and weighs 0.5–3.5 kg (1.1–7.7 lb); The world record is 50.31 pounds, caught in Trinity River, Texas in 1954; FishBase reports a maximum size of 2 m (6.6 ft). Average life span is 17- 20 years.
Tight lines
Trevor