Salmons eat other aquatic animals and have a lifespan of about 12 years. There are 7 species of salmon. After spending 1 to 5 years in the open ocean, they return to freshwater streams to spawn. Salmon benefit their predators by undergoing physical changes that allow them to live in saltwater, making them accessible as a food source to predators. Female salmon spawn between 3,000 to 15,000 eggs per run to increase the chances of egg survival due to ocean predators.
![Salmons ,[object Object],They eat other aquatic animals. ( http://wiki.answers.com/Q/What_do_salmon_eat ) ,[object Object],[object Object],http://www.jobmonkey.com/alaska/html/life_cycle_of_salmon.html ,[object Object],[object Object],http://en.wikipedia.org/wiki/Salmon ,[object Object],[object Object]](https://image.slidesharecdn.com/salmons2011-110307090254-phpapp02/85/Salmons-2011-1-320.jpg)
![[object Object],After the eggs are hatched, the fry’s smolt body chemistry changes, allowing them to live in salt water. Smolts spend a portion of their out-migration time in brackish water. Predators can then hunt for them as a source of food more often. ,[object Object],This is because there are many predators in the ocean. By spawning more eggs, the higher the chance of the eggs surviving.](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)