How are squids and jellyfish different?

Jellyfish have Radical Symmetry and Cnidaria (Latin for "stinging cells") Also, they have two cell layers that are organized into tissue. Cnidaioans hace digestive,muscle,nerve, and sensory tissue. The Cnidarian body is a hollow sack with only ONE body opening (a mouth). It is surrounded by rope-like pieces of tissue called tentacles (arms). These tentacles may contain stinging cells. Hope that helps.