cloud of jellyfish
DNA sequencing has revealed jellies are the oldest multicellular animal on our planet, putting them at the base of the tree of life. Photo: Howard Hall


Sea nettles
Jellies were the first creatures to swim - 600 million years ago. They are probably the most efficient animal that moves. Photo: Howard Hall


jellyfish stinging cells
Jellyfish stinging cells fire, pierce its prey and release its toxin in 700 nanoseconds – about the same speed as a bullet being fired. Photo: Plankton Chronicles, CNRS


lions mane with moons
Jellies have no senses as we know them. But they can detect chemical traces in the water that lets them sense food and predators. Photo: Evergreen Film Studios


box jellies cluster
The deadly box jelly has eyes grouped in clusters of six on the four sides of their bell.  Its believed they can sense light, but without brains images can’t be processed. Photo: Aquavision
 

jelly mnemiopsis
The comb jelly mnemiopsis is able to eat over ten times its own body weight in food and double its size each day. They never get full. Photo: Ed Middleton


comb jelly beroe
The comb jelly beroe have hundreds of rows of “teeth” made up of tiny hairs that can pierce and pull its prey into its stomach. They also help digest the prey by tearing it to shreds. Photo: T3 Media/Nat Geo


colourful jellyfish with seaweed
Jellyfish inhabit all depths of the oceans, all latitudes and exist in fresh water as well. Photo: Howard Hall


moon jelly
In 1991 moonfish jellyfish travelled into outer space on the Space Shuttle Columbia. The scientists wanted to examine the effects of microgravity on simple organisms. Photo: Howard Hall



Turritopsis dohrnii,  the immortal jellyfish, is the first known example of true biological immortality. Studying how they are able to switch genes on and off may help find a cure for cancer. Photo: Toyotaka Yamada
 

group of sea nettles
Jellyfish don’t get tangled up because the tentacles are slippery.  Their stinging cells don’t fire when they come in contact with their own tentacles or other jellies from their own species. Photo: Doug Trent

The Wild Canadian Year

Wild Canadian Year


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From CBC Kids

The Nature of Thingies