A Female Sockeye Salmon (Oncorhynchus Nerka) Uses Her Anal Fin To Probe Her Redd While A Jack Is Positioned Downstream. Underwater View In An Alaskan Stream During The Summer.

alaska anal fin behavior covering defend egg female fish floating jack male nobody oncorhynchus nerka pacific salmon probe probing red salmon redd salmonidae salmoniformes salmoninae sockeye salmon spawning spawning behavior stream summer superimposed swirling underwater usa wildlife thomas kline anal fin oncorhynchus nerka pacific salmon red sockeye photography color image horizontal united states of america outdoors no people animal themes two animals full length side view day animals in the wild female animal swimming rock 2 animals full length us united states american north american colour image colour color outside no one no one