Sponges are animals of the phylum Porifera (meaning "pore bearer"). They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl（英语：mesohyl） sandwiched between two thin layers of cells.
Sponges have unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes.
A Lynx is any of several medium-sized wild cats. Lynxes have short tails, and usually a tuft of hair on the tip of the ears. They have large paws padded for walking on snow, and long whiskers on the face. The lynx inhabits high altitude forests with dense cover of shrubs, reeds and grass.