How Crabs Find Plankton
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Objective
I can describe how crabs use their senses to find plankton near the ocean floor.
Part 1 of 4
Warm-up video
Hakai Institute · 3:29
We don't generate video — this one is by Hakai Institute on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
Plankton, from the Greek word for wanderer, are plants and animals that drift through the ocean.
- 2
Phytoplankton are plant-like organisms powered by the sun through photosynthesis, producing at least half of the oxygen we breathe.
- 3
Some plankton, like squat lobsters, only spend the first part of their life as plankton before settling on the sea floor, while others, like moon jellyfish, start on the ocean bottom before becoming planktonic nomads as adults.
Part 3 of 4
Practice
10 questions
What are the two main types of plankton discussed in the video?
According to the video, what is the primary role of phytoplankton in the ocean ecosystem?
Part 4 of 4
Exit ticket
Quick comprehension check
“Describe how squat lobsters use their senses to find plankton before they settle on the sea floor.”
Sample answer included in the free materials
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