Point of pedantry, but we don’t actually know that. It is possible that they spawn into existence full-grown as part of some magical process (fission, perhaps), or that their regenerative powers don’t activate until they’ve grown to adult size. For the latter, it’s not like they don’t have enough other natural defenses to protect them until they reach adulthood.
Point of pedantry, but we don’t actually know that. It is possible that they spawn into existence full-grown as part of some magical process (fission, perhaps), or that their regenerative powers don’t activate until they’ve grown to adult size. For the latter, it’s not like they don’t have enough other natural defenses to protect them until they reach adulthood.