Jellyfish populations are increasing
Populations of jellyfish are increasing around the world. Mackenzie Neale, director of animal care and "jelly queen" at Vancouver Aquarium, says it's because jellies have less competition for food due to overfishing and because contaminants in the ocean trigger more jellyfish reproduction. For example, she says that jellyfish polyps "love to grow on plastic" and on structures like docks and pilings. The more we add to the ocean, the more we create "prime jellyfish breeding grounds." She adds that the slightest change in temperature, whether in the ocean or in a tank of jellyfish, triggers jellyfish "polyps to start producing more jelly babies." While jellyfish are beautiful to look at, protecting our oceans will help keep jellyfish populations in check. Find out what the world's most polluted beaches used to look like.
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Moon jellyfish are frequently seen off the Atlantic coasts of North America and Europe. These transparent and bioluminescent beauties look like moons floating through the water, hence their name. It's possible to see moon jellyfish both in the water and washed up on beaches. The sting of a moon jelly is mild and they're quite easy to avoid in the water. Melanie Roberts, senior aquarist at SeaWorld Orlando, says that "moon jellies can get as big as a dinner plate." Moon jellies are an important food source for leatherback turtles and ocean sunfish, according to Oceana. Think moon jellies are cool? You might also like these 10 spooky facts you never knew about the moon.
Jellyfish are mostly bags of water
Only biologists and other experts should touch jellyfish—it's bad for them and for you. There's a good chance you could damage the fragile creatures and they could sting you. Jellyfish are invertebrates, meaning they don't have any bones. In fact, 95 percent of a jellyfish's body is water, according to the National Ocean Service (humans are about 60 percent water). Being made mostly of water helps jellyfish float beautifully through both oceans and aquariums. Some jellyfish even look exactly like bags of water, like these jellies from Thailand's Andaman Sea. They're only one of infinite numbers of amazing sights in the world's oceans.
13 Mesmerizing Photos of Jellyfish You Have to See, Source:https://www.rd.com/culture/mesmerizing-photos-of-jellyfish/