Anon05/02/26, 11:36No.5121160
https://www.smithsonianmag.com/smart-news/these-tiny-fish-check-themselves-out-in-a-mirror-before-deciding-whether-to-fight-180985061/Bluestreak cleaner wrasse set up “cleaning stations” on the reefs, then wait for other fish to show up so they can eat the parasites. They also have good memories and can recognize more than 100 different “clients.”Last year, researchers also showed that bluestreak cleaner wrasse could recognize themselves in photos after looking at their reflection in a mirror.Scientists wanted to explore the bluestreak cleaner wrasse’s self-awareness on an even deeper level, so they set up a series of new experiments.In the first phase, researchers placed a bluestreak cleaner wrasse inside a clear fish tank. Then, they held photos against the glass showing bluestreak cleaner wrasses of varying sizes—some that were 10 percent larger than the fish in the tank, and some that were 10 percent smaller. No matter which photo the scientists showed, the bluestreak cleaner wrasse inside the tank tried to attack it.Next, the team repeated the same experiment but added a mirror to the tank. The fish checked out their own reflection before deciding whether to fight—and they would only battle photos of smaller intruders, not larger ones.To scientists, this suggests that bluestreak cleaner wrasse are capable of understanding their own body size, as well as how their body size stacks up against a rival.“This was unexpected because we had an image that this fish always shows aggression against rivals, regardless of size,” says study co-author Taiga Kobayashi.There are no mirrors in the wild, so the findings also suggest that cleaner wrasse adapted and learned to use the mirror as a self-preservation tool. This discovery can “help clarify the similarities between human and non-human animal self-awareness and provide important clues to elucidate how self-awareness has evolved."https://www.youtube.com/watch?v=Ujy9EmUzN4E