Jellyfish, along with other Cnidarians, have a specialized structure
that is used for both feeding and defense. These cells are called
cnidocytes. When anything brushes up against the cnidocytes,
spear-like, toxin-containing nematocysts are ejected. The prey is
thus held and subdued until it can be ingested into the mouth of the
jellyfish. Typically, the majority of cnidocytes are found around
the mouth and on the tenticles.
When ingested, the prey is
pushed into the gastrovascular cavity by ciliated action. It is
then broken down by digestive enzymes.
Moon Jellyfish are not
nearly as picky of eaters as you and me but their usual diet consists of
a variety of zooplankton including copepods, cladocerans, larvaceans,