If you’re looking for a surveying technique to incorporate into your lessons, check out our fact sheet on the capture-recapture method! https://marinewaters.fish.wa.gov.au/resource/fact-sheet-capture-recapture-method/
Or have a look at the Marine Waters lesson: Capture-recapture experiment, which includes a student worksheet – https://marinewaters.fish.wa.gov.au/resource/lesson-capture-recapture-experiment/
Use this to collect and analyse data in the classroom with your students.
Scientists can learn a lot about species using this method. Have a look at this fact sheet on tailor to see what they discovered about migratory movements in tailor – https://marinewaters.fish.wa.gov.au/resource/fact-sheet-tailor/