11. The embryos are brooded there before being released as planula larvae into the water column. 12. The egg hatches in the digestive system of the intermediate host, producing a planula larva. 13. The fertilized egg develops into a planula , which settles and grows into a single polyp. 14. Fertilised eggs develop into planula larvae. 15. A few omit the planula , polyp and ephyra phases and produce new medusae directly from eggs. 16. Planula larvae swim with the aboral end ( the end away from the mouth ) in front.17. The planula larvae drift with the currents before settling on the seabed and undergoing metamorphosis into polyps. 18. The resulting embryos develop into planula larvae which one to three weeks later settle on the seabed. 19. After fertilisation, a planula larva forms which later develops into a cubopolyp with a few tentacles. 20. The eggs develop into planula larvae which drift with the current before settling and growing into new individuals.
