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Planulae use their small cilia to propel them through the water, eventually settling on a hard sediment on which they develop into their polyp form. The scyphistomae acquire their photosynthetic algae symbionts during their preliminary development phase, though the mechanism for this is still unclear. These microorganisms live primarily in the mesoglea and lining of the cnidarian's gastrovascular system, bolstering oxygen production, and remain with the jellyfish for the rest of their lifespans. The polyps also undergo asexual reproduction to create more polyps parts of each polyp will eventually metamorphose into ephyrae, which range between 1.7 and 4.2 mm in diameter. Young medusa take 8–10 weeks to reach an initial diameter of 3 cm, and then will grow by approximately 3–4 cm per week until reaching their final adult size. Gradually, the medusa develop with an average final diameter of approximately 35 cm. Sexual reproduction between adult medusa typically occurs between August and October. Female C. tuberculata are internally fertilized with sperm from the moutharm appendages of their male counterparts, and after a gestation period, eventually release large numbers of planulae into the water.
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