Sea Turtle Food Web: A Build-It Activity

A sea turtle food web shows feeding connections, not a menu shared by every turtle. In this paper activity, choose a species, add its food, and explain which way your arrows point. You need paper, a pencil, and about 15 minutes.

Start with two different turtles

Many green turtles feed mainly on seagrasses and algae, but diet can vary with habitat and life stage. A leatherback feeds on soft animals such as jellyfish. These are different feeding connections. Check the NOAA green turtle profile and NOAA leatherback profile before choosing your cards.

Make four cards: seagrass, green turtle, jellyfish, and leatherback. Draw each organism, or use its name. You do not need to print a picture.

Give the arrows a job

For this model, an arrow means food goes to an eater. Draw an arrow from seagrass to green turtle. Draw another from jellyfish to leatherback. Read each connection aloud: “The green turtle eats seagrass.” If you read it backward, fix the arrow.

These two pairs are the beginning of a model, not a complete ocean food web. A full web needs more feeding connections. Add a question card beside the jellyfish: What does this jellyfish eat? Different jellyfish have different diets, so identify one and check a reliable source before adding that arrow.

Test your model

Ask a partner to explain your arrows without your help. Then discuss:

1. Does the drawing suggest every sea turtle eats the same thing? How could you prevent that mistake?
2. Which connection did you check in a source?
3. What information would you need before adding a predator?

Do not connect organisms just because they live in the ocean. A food web needs evidence about who eats whom. You can investigate possible predators with What eats sea turtles?, keeping the turtle's size and life stage in mind.

A change to think through

Cover the seagrass card. Your model now shows a food source missing from the green turtle's branch. It does not tell you exactly how many turtles would survive, whether another food is available, or how quickly the habitat might recover. Write one prediction and one question you would need to investigate.

Teacher discussion: A useful answer names the species, reads the arrow correctly, and separates evidence from a guess. Let younger learners explain orally; ask older learners to add a sourced connection and describe a limitation.

Compare your model with our species guide and turtle diet article. Play Pollution Sort afterward and explain why a pretend sorting game cannot represent every real turtle's diet.