But we did not know that they were limited to spawning once a day; on the contrary the gibbons proved they weren't.

Or the Salmon Once Spawned Tunnel, in honor of the disruption she says the work caused to the fish.

Yellow perch spawn once a year in spring using large schools and shallow areas of a lake or low-current tributary streams.

Individuals are either male or female and spawn once a year.

Most individuals only spawn once in their lifetime, and female fecundity is very low.

Females spawn once per year and regenerate their gonads, making nautiluses the only cephalopods to repeat reproduction.

Shorthead Redhorse spawn once a year and will travel either upstream or downstream to reach their spawning ground.

These fish only spawn once during the spawning season.

These fish only spawn once in a spawning season and produce around 75,000 eggs.

Scallops that escape predators and the risk of burial by shifting sediments typically live 18 months, spawning once, sometimes twice.