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🕸️ Ocean Food Webs

One ocean animal usually eats many foods, and is eaten by many others. See how dozens of food chains link together into a tangled ocean food web.

3
lessons
~15 min
to learn
🔬 Science
subject
Ages 6–12
level
Start the course →

What you’ll learn

  1. From Chains to WebsUnderstand that a food web is many food chains linked together, and identify producers and consumers.A food web is many food chains joined together, showing how the plants and animals in a habitat depend on one another for food. Producers like sea plants make their own food from sunlight, while consumers eat other living things. Arrows point from each food to its eater, tracing the flow of energy.
  2. Who Eats WhomTrace energy through an ocean food web from plankton upward, and sort living things into producers and consumers.Most ocean food webs begin with phytoplankton, the producers, which zooplankton and then fish eat in turn. Energy always flows from food to eater, following the arrows up from producers to consumers. Every living thing in the web is either a producer, which makes its own food, or a consumer, which eats other living things.
  3. A Web in BalanceLearn that removing one animal affects many others, and that recyclers keep nutrients cycling.Because a food web connects everything, removing one animal ripples out and affects many others, so the web keeps the ocean in balance. Recyclers such as sea-floor crabs, worms, and microbes break down dead plants and animals, returning nutrients to the water to feed the producers again. Every role matters to a healthy ocean.

Questions this course answers

What is a food web?

A food web is many food chains joined together, showing all the feeding links between the plants and animals in a habitat.

What is a producer in an ocean food web?

Producers, like phytoplankton and seaweed, make their own food from sunlight, forming the base of the web.

What do most ocean food webs begin with?

Almost every ocean food web starts with phytoplankton, the tiny floating plants that catch sunlight and feed everything above them.

Which way does energy flow along the arrows in a food web?

Each arrow points from the food to the eater, showing energy passing up the web from producers to consumers.

What can happen if one kind of animal is removed from a food web?

Because everything in a web is connected, removing one animal ripples out and affects many others that depend on it.

What job do recyclers like sea-floor crabs and microbes do?

Recyclers feed on dead plants and animals, breaking them down and returning nutrients to the water to feed the producers again.

Grounded in trusted sources

  • NOAA
  • National Geographic Kids
  • Smithsonian Ocean
  • Britannica Kids

Every Wunder lesson is built from real, reputable sources — never invented.

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