Alligator Gar In Ohio River. Other large river fish species include sturgeon, paddlefish, arapaima, and alligator gar, which can grow to several hundred pounds in weight and over 7 feet in length. Alligator gar are found in very large rivers and associated back waters and marshes.

Since 2010, fwri researchers have been tagging alligator gar in the escambia river to learn more about their movement and habitat use. Alligator gar, longnose gar, shortnose gar, and spotted gar.