The longnose gar, Lepisosteus osseus, is a primitive ray-finned fish of the gar family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

. It is also known as the needlenose gar.
The longnose gar ranges in length from 60–182 cm (23.6–71.7 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

FishBase

FishBase is a comprehensive database of information about fish species . It is the largest and most extensively accessed online database on adult finfish on the web...

 reports a maximum size of 2 m (6.6 ft). Average life span is 17- 20 years.