Population Demographics for St Joseph, Minnesota in 2016 and 2015.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  spawn(verb) the mass of eggs deposited by fish or amphibians or molluscs. 2  engender, breed, spawn(verb) call forth. 3  spawn(verb) lay spawn. The salmon swims upstream to spawn.
The primary means of fish reproduction are egg laying and live bearing. Egg-laying fish release eggs that are later fertilized. Live-bearing fish internally fertilize the female, who carries the offspring within until they develop and are birthed. The release of fish eggs and their subsequent fertilization is called spawning. Most marine fish reproduce by releasing thousands of small eggs into the water for external fertilization.Egg-laying fish have a variety of methods for releasing the eggs.