Recently, the necessity of marine education is associated with the conservation of the marine environment. Accurate knowledge of marine organisms is essential for their preservation as well as that of their habitat. In the education of living things, a functional-morphological viewpoint with high visibility is very useful. We created functional-morphological quizzes of sea turtles and conducted a marine education course for elementary school students and their parents and verified its usefulness. Students were given hints regarding the functional morphology of sea turtles and tortoises, the correct answer rate was analyzed before and after the hints were given. Regarding the relationship between the entire silhouette and the habitat, the correct answer rate was high when no hints were given. However, the correct answer rate for questions about the forms of limbs and carapaces was higher after the hints were given. In questionnaire of the impression and comprehension for the course, most participants indicated that the course was excellent or good, and that the subject was easy to understand. Further, we were able to raise awareness of conservation through the course. It was inferred that the functional-morphology quiz about sea turtles was useful for marine science education.

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