High Five Facts - Jelly Fish

The video presents five fascinating facts about jellyfish. It explains that jellyfish are not fish because they are invertebrates, lacking bones and a skeletal system. They are composed of 98% water and have no brain or heart, relying on a simple nervous system. Jellyfish can sting even after death due to venomous tentacles. They vary greatly in size, from tiny 1mm species to the massive Lion's Mane jellyfish. Some jellyfish exhibit bioluminescence, using light to deter predators. The video concludes with a recap of these intriguing jellyfish facts.

What is the size range of the smallest and largest jellyfish?

What is bioluminescence and how do jellyfish use it?