Jellyfish
Jellyfish have a basic medusae body structure and the most well thought of in the phylum Cnidaria, with an umbrella body form and tentacles at the rim of the umbrella. Jellyfish are the major non-polyp form of individuals of the phylum Cnidaria. The bell can pulsate for movement, while stinging tentacles can be used to capture prey.
Jellyfish are found in every ocean. Large, often colorful, jellyfish are common in coastal zones worldwide. Jellyfish have roamed the seas for at least 500 million years, making them the oldest multi-organ animal. Jellyfish have no brain nor central nervous system, but employ a loose network of nerves, located in the skin, which is called a "nerve net".
Jellyfish ride the current at ebb tide until they hit a gravel bar, and then descend below the current. They remain in still waters waiting for the tide to rise, ascending and allowing it to sweep them back into the bay.
Jellyfish are found in every ocean. Large, often colorful, jellyfish are common in coastal zones worldwide. Jellyfish have roamed the seas for at least 500 million years, making them the oldest multi-organ animal. Jellyfish have no brain nor central nervous system, but employ a loose network of nerves, located in the skin, which is called a "nerve net".
Jellyfish ride the current at ebb tide until they hit a gravel bar, and then descend below the current. They remain in still waters waiting for the tide to rise, ascending and allowing it to sweep them back into the bay.