Jellyfish
Scyphozoa (class) · Marine Animal, Invertebrate, Cold-blooded, Wild
Animal Family
Various families, order Scyphozoa, class Scyphozoa
Animal Category
Marine Animal
Breed / Variety
True Jellyfish
Conservation Status
Least Concern, population trends generally stable with some species blooming due to overfishing and climate change.
About This Creature
Gelatinous marine animals with umbrella-shaped bells and trailing tentacles, ranging greatly in size from microscopic to several feet across with extremely long tentacles.
Physical Characteristics
Composed of a gelatinous substance called mesoglea, lacking a brain, bones, or heart, featuring a bell, oral arms, and stinging tentacles equipped with cnidocytes.
Behavior & Temperament
Drifting locomotion using muscular contractions of the bell, solitary, passive hunters, utilizing stinging cells for defense and prey capture.
Habitat & Diet
Origin Region
Global oceans, from coastal waters to the deep sea
Habitat
Ocean/Marine, Aquatic
Diet & Nutrition
Carnivore, consuming zooplankton, small fish, crustaceans, and other jellyfish using stinging tentacles to immobilize prey.
Lifespan & Health
Varies significantly by species from a few months to several years, with some species capable of biological immortality.
Special Characteristics
Possess stinging cells called nematocysts, bioluminescence in many deep-sea species, and a simple nerve net instead of a brain.
Ecological Information
Occupies intermediate trophic levels as both predator and prey, serving as food for sea turtles, fish, and birds, and helping regulate plankton populations.