![]() The sperm and egg merge and form a planula larva, which matures inside the body of its mother. What is a planula and how does it start the process of a reef forming?įertilization of an egg within the body of a coral polyp is achieved from sperm that is released through the mouth of another polyp. Planula larval stages are common to many Cnidarians. The planula is lined with cilia and eventually settles, forming a scyphistoma. The planula is the first larval stage of Aurelia, and is formed soon after the egg and sperm combine to form a zygote. … Amphiblastula is the free swimming larva of certain sponges. Planula is the ciliated, bilaterally symmetrical, flattened, free swimming larva of organisms in the phylum Cnidaria. Why is the movement of water key to a sponge’s survival?.What is the common adaptation of cnidarians?.What is the function of a cnidarians tentacles?.How does the polyp switch to the medusa stage?.Do all invertebrates have planula larva?.What causes a planula larvae to settle?.What is a planula and how does it start the process of a reef forming?. ![]() What is the difference between planula and Amphiblastula?. ![]()
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