
Sea worm’s reproductive bits grow their own eyes before mating
Laura Baisas
created: May 20, 2025, 6:30 p.m. | updated: May 30, 2025, 6:33 p.m.
Even among the numerous gnarly animals swimming, crawling, and “flying” through the world’s oceans, the branching marine worm (Ramisyllis kingghidorahi) has a very interesting reproductive style.
Each of these tails can then produce separate living reproductive units called stolons—which can grow eyes.
Close-up of a female stolon–one of the independent reproductive units–from the worm Ramisyllis kingghidorahi.
This genetic upregulation could help Ramisyllis develop more of the eyes on their many stolons.
There could also be partial genome duplication in Ramisyllis, which may help explain why this worm has such a complex anatomy and reproductive system.
2 months, 2 weeks ago: Popular Science