This very strange looking jellyfish was at the Monterey Bay Aquarium. The Egg-Yolk Jellyfish is a fairly large jellyfish with a bell that grows to 2 feet in diameter. It has a weak sting and feeds mostly on smaller jellyfish.
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Photo taken with a Canon EOS 40D, EF17-40mm f/4L lens, 1/80 sec at f/4.0, ISO 640on SanDisk Extreme IV Digital Film.