| http://www.w3.org/ns/prov#value | - Some species can also release toxins which render their predators incapacitated and allow them to escape.Others can release acid from their skin when irritated.There are more than 3,000 described species of nudibranchs and they occur in oceans worldwide including both tropics and Antarctica.They can be found crawling over rocks, seaweeds, sponges, corals and many other substrates
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