Friday, April 18, 2008

Research on jellyfish's food

What do Jellyfish Eat?

Jellyfish feed on fish and other small sea animals.

Can we see what jellyfish eat?

Since jellyfish eat very small sea animals, some of the sea animals that jellyfish eat are microscopic and so small that we cannot see with our eyes. We need a microscope to see the microscopic sea animals that are jellyfish's food. Scientists call this collection of small sea animals zooplankton.

What are zooplankton?

Zooplankton are tiny sea animals known to be jellyfish food. Zooplankton include:

  • tiny shrimp
  • eggs of sea animals
  • baby sea animals
  • other small stingers
Where are zooplankton?

Zooplankton are found in each drop of sea water. They can only be seen under a microscope. Although, zooplankton are small, thousands and thousands of them add up to become a meal for jellyfish.

How do jellyfish find food?

Jellyfish find food by using their oral arms to sweep zooplankton into thier mouths as they swim through the water. Jellyfish do not hunt. Jellyfish use thier tentacles to capture large prey by stinking them and kill them. The dead prey is then brought to the jellyfish 's mouth by the tentacles.

--->source

Zooplankton, the animal form of plankton, includes protozoa, small crustaceans, jellyfish and worms. Protozoa are single celled organisms that can colonize; they can live in oceans, salt lakes, freshwater lakes, rivers and ponds and vary in size for two to seventy micrometers and even larger. Crustaceans are invertebrates that live in water as well as on land and can vary from microscopic to sixty centimeters. Zooplanktons main sustenance are bacteria and phytoplankton, making them the second link in the food chain (Vegas).

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