Because  their  tissue  are hypotonic with  marine  environment  Jellyfish  are  Marine  habitat. The  solution  inside the cell  contain  fewer  solute  than  outside  solution (  marine water)  The  jellyfish cell  losses  water  through  osmosis. In  addition  these  cells  gain electrolytes  by diffusion.
        
                    
             
        
        
        
ATP stores and transports energy in the cells, usually in the mitochondria. Energy is released by hydrolysis (carbohydrates being broken down into sugar molecules), which eventually results in forming ADP (adenosine diphosphate) that absorbs the energy and recharges the phosphate group and ATP
        
             
        
        
        
100,000 years ago is your answer