no not all
All Cnidarians have tentacles with stinging cells in their tips which are used to capture and subdue prey.
Asexual and Sexual. Asexual is where only one organism produces by its self. A common form of this is called 'budding' This is where small 'arms' grow out the side of the main organsim, then fall off and start its life somewhere else. Sexual is where sperm from an oragnism meets an egg from another organism and a new organism begans to grow.