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Jellyfish   (Cnidaria)
Category: Invertebrates



Jellyfish are typically free-swimming animals consisting of a gelatinous, inverted-umbrella body form (the bell) with trailing tentacles. Having roamed the sea for the last 500 (and maybe 700!) million years, they are the oldest known multi-cellular animal. Since jellyfish are not true fish, many experts prefer to use the name “jellies” to avoid cultivating misconceptions. The body of a jellyfish is between 95% and 98% water and most do not have specialized digestive, osmoregulatory, central nervous, respiratory, or circulatory systems. They can range in size from about 1 millimeter to a bell height and diameter of over 2 meters (6.6 feet). The lion’s mane jellyfish (Cyanea capillata) has fine, threadlike tentacles that may extend over 36.5 meters (120 feet!).



Data & Facts

Scientific Classification
Kingdom - Animalia
Phylum - Cnidaria

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Interesting Animal Facts

It’s an ant’s world. We’re just living in it.

Do humans truly dominate the world? The Argentine ant may have something to say about that. Many ants are known for their large colonies, but the Argentine ant, named for its South American origins takes this to a whole other level. Due to inadvertent introduction by humans, the Argentine ant has spread to all continents except Antarctica. There are now three known super-colonies of these ants: one in Europe (the largest, covering 3,700 miles), one in California (560 miles), and another on the west coast of Japan. Ants are often territorial, but amazingly, ants belonging to the super-colonies recognize one another: if you were to introduce a super colony ant from Japan to one from Europe or California, they will recognize each other as friends!

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