Jellyfish are fascinating marine creatures known for their gelatinous bodies and umbrella-like shape. They are classified under the phylum Cnidaria, and are typically transparent or translucent. Jellyfish have long, trailing tentacles that contain specialized cells called nematocysts, which they use to capture prey and defend against predators.

Some key facts about jellyfish:

Anatomy: They lack brains, hearts, or bones. Instead, they rely on a nerve net for basic movements and responses.

Habitat: Jellyfish are found in oceans all over the world, from shallow coastal areas to the deep sea.

Diet: They feed on small fish, plankton, and other marine organisms, using their tentacles to sting and immobilize their prey.

Lifespan: Some jellyfish species have a short lifespan, while others, like the Turritopsis dohrnii (the “immortal jellyfish”), have a unique ability to revert to their juvenile form, essentially avoiding death in certain conditions.