Cnidarian
Cnidarian explained in an easy to understand way:
Imagine you're walking barefoot on a sandy beach, and suddenly, you step on a sharp shell. Just like that unexpected sting from the shell, cnidarians such as jellyfish have specialized cells called cnidocytes that release a sting to their prey or threats. The connection here is that the sharp shell is akin to the stinging cells of a jellyfish, both serving as sudden defenses or deterrents that catch you by surprise and make you cautious of your surroundings.
Practice Version
Cnidarian: Aquatic invertebrates with stinging cells, like a jellyfish. Cnidarians are simple aquatic animals that often have tentacles with stinging cells for capturing prey.