Any one of the acalephs, esp. one of the larger species, having a jellylike appearance. See Medusa and acaleph.
Approximately 200 transparent or translucent marine species in the phylum Cnidaria and class Scyphozoa that spend a majority of their life in the medusa stage that follows an immature, polyp stage. Medusae have a central, radially symmetric bell (or “medusa”) and tentacles called nematocysts that hang below in order to stun and ensnare prey.
Some inflatables "jellyfish" rythmically when they fly in the air, hence the term. This is due to either poor design, or varying wind conditions, or the kite losing air and flopping around more than your manhood hanging free.
large siphonophore having a bladderlike float and stinging tentacles
any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans
an invertebrate made up mostly of water, it has no heart, brain or bones
A jelly-like, free-swimming sea animal with a bell-shaped body, and generally with long stinging threads on the surface.
n. Phylum Cnidaria, Class Scyphozoa, Class Hydrozoa, Class Cubozoa. A free-swimming marine cnidarian that has a nearly transparent, saucer-shaped bell and tentacles and swims by pulsing its body.
Any of a variety of free-swimming, marine invertebrates characterized by an umbrella-shaped body largely made up of a jelly-like substance and long, hanging tentacles with stinging cells on them
Jellyfish are marine invertebrates belonging to the Scyphozoan class, and in turn the phylum Cnidaria. The body of an adult jellyfish is composed of a bell-shaped, jellylike substance enclosing its internal structure, from which the creature's tentacles are suspended. Each tentacle is covered with stinging cells (cnidocytes) that can sting or kill other animals: most jellyfish use them to secure prey or as a defense mechanism.