JellyLab Online is a video based science resource designed for primary school teachers in Ireland. This video series is designed to introduce the scientific method in an accessible and engaging way.

Teacher's information pack including guidelines and sample worksheets available here: [ Ссылка ]

Video transcript:

Another animal we really like to study is known as a comb jelly.
Comb jellies are jellyfish-like creatures, about the size of a grape.
They are basically a small see through blob with a mouth on top right here and a belly here. If you look closely, you can see food in their belly.
They have paddles all over their body. The paddles flap up and down and this allows them to swim through the water.
We find these animals in the sea and we catch them with a special net. Then we bring them back to our lab, right here.
We can’t keep them in a normal tank because they sink to the bottom.
We have to keep them in these special tanks have salty water that moves in a circular direction. The comb jellies seem to be very happy in these tanks!
They have two tentacles that are covered in a special glue. They fan out their tentacles to create a big sticky web.
They like to eat tiny shrimp known as brine shrimp.
They catch their food when the shrimp is caught on a sticky tentacle.
But how does the comb jelly get the shrimp from the tentacle into the mouth?
You see, this is easy for us. If I want to eat something I just pick it up and move my arm towards my mouth, but this is tricky for the comb jellies.
Because all they can do is suck their tentacles inside their body or stretch their tentacles outside their body. So most of the time the tentacles are just drifting along in the water.
They can’t decide to move their tentacle towards their mouth.
How do you think the comb jellies get the shrimp from the tentacle into the mouth when all they can do is pull their tentacle in or out?

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