This is one of the biggest rivers in Vestfjörðum with an average flow around 16 cubic meters per second. The source is Ófeigsfjarðarheiði, about 500 m above sea level. In Selá there are both sea-char and salmon, but the char fishing has decreased in recent years for reasons unknown. The average season catch is about two hundred char but this figure increased to 600 in 2006. Juvenile salmon were released into the river several years ago and the average salmon catch has been around 80 fish each summer. The population of juvenile salmon has been good, according to the Chairman of the fishing association, and therefore juveniles have not been released into the river in recent years.