The crystal jellyfish is completely transparent except for its bright glowing ring, which helps it attract prey in dark ocean waters!
Aquatic Animals - Facts for Kids

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Random Facts About Aquatic Animals For Kids
Seahorses often hide in seaweed forests that can grow as tall as a two-story house!
Great White Sharks have a special organ called a lateral line that runs down their body, helping them feel vibrations in the water!
Some nudibranchs are out and about in the daytime, others do their exploring at night — many follow their internal clocks so they move more in one part of the day than the other, depending on the species!
Box jellyfish belong to the class Cubozoa, named for their cube-shaped bells!