Muscular System of Jellyfish
Jellyfish do not have many muscles. In fact, their only muscles are their tentacles. A jellyfish's amount of tentacles varies, some only having about 8, while others have hundreds. The size also changes depending on the species of jellyfish. The tentacles contain something called venom apparatus. Jellyfish use their tentacles to catch their prey. Once the prey has been killed by the venom, the tentacles help transport the food to the mouth of the jellyfish. The tentacles also help the jellyfish to defend themselves against predators. Even if the sting doesn't necessarily kill the large predators of the jellyfish, they are capable of having a paralyzing effect on them, which gives the jellyfish enough time to escape.
A wise man once said
SpongeBob is the only guy I know who can have fun with a jellyfish,
[shouting] for twelve hours!
- Squidward Tentacles
This quote shows jellyfish are not very fun.