Why are jellyfish shaped the way they are?

Jellyfish are shaped like they are primarily for efficient movement and feeding. Their bell-shaped, gelatinous bodies allow them to pulse and glide through water, enabling them to travel with minimal energy expenditure. This shape also facilitates the capture of prey, as their tentacles extend outwards to ensnare small organisms while providing a wide range for passive feeding. Additionally, their translucent bodies help them avoid predators in the open ocean.