Unnamed Jellyfish

Name of Race : No name yet, calling them blimps for now

Body Type : Basically like a jellyfish with a more spherical body

Average Height : 6 meters including the tentacles

Number of Limbs : 4 grasping limbs and about 24 stingers

Intelligence : Non-sentient, little to no intelligence

Diet : Fish, insects, smaller mammals, seabirds

Lifespan : 3-4 years

Appearance : A translucent gas sac of thin skin attached to a gondola-like digestive and nervous system below. It has 4 translucent, boneless tentacles that attach to its body and bring food to its primitive mouth, where it enters the digestive system. It also has 24 stingers that drift around along with its tentacles, that serve to incapacitate prey with poison. The stingers also serve as feelers, since this creature has only limited eyesight from 4 small eyes placed around its "head", a semi-developed sense of smell, and no sense of hearing.

Physiology : Bear with me since this might not be possible, but the blimp uses hydrogen gas to fill its gas sac and stay afloat. It does this by taking in seawater from the ocean, and using electrolysis to split the water and create hydrogen. This allows it to be less dense than air and float around. They generate the electricity with a specialized organ, much like electric eels. I have no idea if this can work but it makes sense in my head.

Origins : If we're going with evolution, then it makes sense that they were originally sea-creatures akin to jellyfish that developed the ability to fly due to oceans drying up or population pressures.

Sexes/Lifespan : Binary genders. They mate by planting their seed into a female, who then lays thousands of little eggs into the ocean, where they grow until they are big enough to fill their balloons with seawater then convert it into hydrogen and fly away.

Habitat : Blimps are commonly sighted along the coastline in tropical climates. They stay near the oceans of the equator where it is less windy.

Social Behavior : Blimps travel in colonies, ranging in size between 30 and 300 individuals. Occasionally a blimp will be separated from its flock, but it is much more vulnerable alone. Blimps are covered in bioluminescent markings that help them spot each other in the dark, and even communicate.

(I know that flying electric jellyfish is a crazy idea that makes little sense in terms of evolution, but I think it can work and if anyone can help flesh out the science that would be great.)