Non-migratory
Guard their eggs
Spawning in groups
Resident fish, do not migrate
Livebearer, females give birth to live young
Unknown
No specific migration pattern
Spawning in large groups
Spawning
Egg scatterers
Sprats do not have a specific migration pattern. They are mainly pelagic and move in response to changes in water temperature and food availability.
During spawning, male sprats form schools and release sperm into the water, while females release their sticky eggs. Fertilization occurs externally.
Egg laying
Spawning in brackish or saltwater
Oviparous (eggs are laid and fertilized externally)
Migratory
Males build nests and guard the eggs
Eggs are released into the water where they are fertilized externally
Males guard the nest
Males perform courtship displays to attract females
No significant migrations
Broadcast spawner
Steelhead migrate between freshwater and saltwater
Females excavate a nest (redd) in the gravel bed, males fertilize the eggs externally