Зуби акули змінюються як конвеєр | A shark’s teeth move like a conveyor

Sharks continually replace their teeth, but “every eight days” is not a universal schedule. In some species and measurements, a tooth row turns over in about a week; in others, replacement may take several weeks or longer. Teeth develop in multiple rows, with new ones moving forward to replace lost teeth. The rate depends on species, age, and how replacement is measured.