Extra: Over the years, I have shared many fascinating articles about the cognitive abilities of these creatures, so it was difficult for me to choose which related article to link to. I will leave you with this gem.

H. formosus Courtship dance (sound on!)
(paper, 2021) bioone.org/journals/the...

Extra: Cleaner fish are wrasses, a group that has been called the "primates of the fish world" because of their tool use, social cognition, and mirror self-recognition.
Take a look at this amazing wrasse (Semicossyphus reticulatus).
Sometimes intelligence is visible at first glance.

What does it feel like to be a remora?

It seems that, despite the benefits they provide, whales do not like their presence and do everything they can to get rid of them. They observe them, jump several times, and check again to see if they are still there.

(blog) phys.org/news/2025-11...