Cnidaria

Cnidaria, also known as Coelantrata , are a Phylum of Kingdom Animalia under Sub-Kingdom Eumetazoa which consists of aquatic, jelly-like organisms.

Characteristic Features

 * Have specialised cells called Cnidocytes that are used to capture prey
 * Solely aquatic
 * Have a simple nervous system
 * May be Polyp - nonmotile, or Medusa - motile.
 * Some show Alternation of Generation between the two.

Further Classification

 * Sub-Phylum: Medusozoa
 * Sub-Phylum: Myxozoa