Jellyfish (Spotted) |
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Saltwater jellies, commonly known as jellyfish, are invertebrates. Like all other invertebrates, they lack the bony spinal column possessed by true fish. Jellies, unlike fish, have no brain; yet they are able to perceive light and dark, know when to spawn, can sense food, and propel themselves through the water with hypnotic pulses of their bodies.
Kevin Raskoff, who studies jellies in the Arctic, calls them, "...probably the most alien life-form on the planet." He says, "Everything we have managed to learn about jellies in recent years keeps pointing to how much more important they are than we thought." |
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