1. Subsequent development produces a tiny larva, known as a planula . 2. The gonozoids liberate crawling planula larvae that search out moving gastropod shells 3. Embryos develop in two to three days leading to a planula larvae. 4. The fertilised eggs develop into planula larvae which become polyps. 5. They produce gametes which, after fertilisation, develop into planula larvae. 6. The embryos develop into planula larvae which are released into the sea. 7. The planula larvae form part of the plankton and drift with the currents. 8. Once attached to a substrate, a planula quickly develops into one feeding polyp. 9. All the polyps and jellyfish arising from a single planula are genetically identical clones. 10. The planula larvae that develop from the eggs drift as part of the zooplankton.
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