An image of the sea (e.g., https://upload.wikimedia.org/wikipedia/commons/8/8e/Lines_of_sargassum_Sargasso_Sea.jpg https://upload.wikimedia.org/wikipedia/common

An image of the sea (e.g., https://upload.wikimedia.org/wikipedia/commons/8/8e/Lines_of_sargassum_Sargasso_Sea.jpg https://upload.wikimedia.org/wikipedia/commons/8/8e/Lines_of...) returns whale or dolphin. I'm still waiting for one to show up. This isn't actual visual "recognition" but rather pattern matching, I guess.