Jellyfish are fascinating creatures that live in oceans around the world. They have a soft, gelatinous body and are mostly made of water, which gives them a unique, translucent appearance. Jellyfish come in various shapes and sizes, with some being as small as a pea and others as large as a human. They float through the water, using their tentacles to catch food like small fish and plankton. Despite their beauty, jellyfish can be dangerous. Their tentacles contain stinging cells that can deliver painful bites to humans and other animals. Some species, like the box jellyfish, are particularly venomous and can cause serious harm. Understanding jellyfish helps us appreciate the complexity of ocean life and the importance of marine ecosystems.