Answer:
Jellyfish, crayfish, and octopi all have a specialized cell in common. This cell helps the organism determine if it is right-side up. It acts similar to a human's inner ear and helps the organism know if it is unbalanced and detects changes in gravity. This specialized cell is called a statocyst.
Step-by-step explanation:
The statocyst is a balance sensory receptor, present in some aquatic invertebrates.