A father fishing with his daughter in Canada caught a spawning sunfish.

YouTuber Vivafrei wrote: "We noticed this fish was peeing but it's not pee - it's sperm."

"What's sperm?" his young daughter asks.

"Sperm is the seed that the male animal uses to make babies with the female," Vivafrei explains tactfully.

He quickly unhooked the fish and returned it to the water so that the sunfish "could go upstream and make babies," he later wrote online.