in Australia I worked on fish in one of the reefs there. To observe their behaviour we used some waterproof cameras with bait in front of them, to film how fish behave!
Then we watched the video in the lab. I did not believe my eyes: a large octopus was sitting near the bait and when a small shark approached the octopus attacked the shark (they have strong beaks) and ate it. – That was weird (and cool).
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