Make your own free website on

Sea Creatures

Smallest Sea Creatures

Levels of the Ocean
Five Major Oceans
Largest Sea Creatures in the World
Smallest Sea Creatures
Most Dangerous Sea Creatures
Sand Dollars

  • They are the smallest creatures in the sea
  • Zooplankton are microscopic invertebrate animals that swim or drift in water
  • They are the base of the food chain
  • Their sizes range from one-tenth of a millimeter to four millimeters (smaller than the head of a pin)
  • They are found in freshwater reservoirs, ponds, and streams
  • Adult females lay different types of eggs, depending on the season and whether the pond is likely to dry soon
  • Most zooplankton are filter feeders, using their appendages to strain bacteria and algae and other fine particles in the water
  • Others are predators, feeding on smaller zooplankton
  • Zooplankton can reproduce rapidly, increasing populations by about 30 percent a day
  • They reach maturity quickly and live shortly
  • Fish prefer to eat the more visible and larger zooplankton, thus the fish that live away from fish in ponds are much larger