There is a video clip during their rest in Hayama (in Kanagawa Prefecture) she took an interest in sea snakes and asked her father Akishinonomiya many times about them.
平成7年（1995年）5月、葉山静養の折り、海岸で眞子内親王が海蛇に関心を示し父・秋篠宮にしきりに尋ねる映像がある。