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Social Structure
Immortal jellyfish are often found in groups of jellyfish, called blooms or smacks, to converge water currents
All jellyfish within a bloom/smack contribute to hunting
These groups of jellyfish do not have clear leaders
Jellyfish do not stay with their young, so the groups are made up of only adult immortal jellyfish
They communicate with each other using chemicals
Reproduction
They mate once per day in ideal situations
They do not mate for life, they mate whenever with whoever
They mate at any time of year
Male jellyfish wrap their tentacles around the female's tentacles and will drag her around for awhile
They can release thousands of eggs per night
They can produce sexually and asexually
Development
First, they start as an egg. Next planula larva. Then, they become a polyp-forming colony called a hybrid and then a more mobile bell-shaped form called medusae. When the medusae becomes damaged or experiences stress like starvation, it absorbs its tentacles and sinks on the seafloor instead of dying. Then, they start again from the hybrid stage.
The length it takes for them to sexually mature varies depending on the temperature of the ocean. If it is 68 degrees Fahrenheit, it will take 25-30 days, but if it were 72 degrees Fahrenheit, it will take 18-22 days.
They start on the seafloor, immobile. They then start to feed and grow. Then, they bud off and develop into mature jellyfish.
Males' sex glands are pink and the females' are brown
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