I'm obsessed with fish that clean other fish: they remember their clients, much like a hairdresser
Briefly

The article explores the fascinating role of cleaner fish in marine ecosystems, particularly how they operate in aquaculture settings. Used by salmon farms worldwide, cleaner fish help combat parasites like sea lice. Interestingly, these fish not only remove parasites but also seem to provide pleasure to their clients, as indicated by their frequent visits to cleaning stations. Some species of fish, such as grouper, form protective relationships with cleaner fish, demonstrating mutual benefits in their interactions. This complex behavior highlights the symbiotic relationships that can exist beneath the ocean waters.
Each cleaner fish can get about 2,000 clients a day, and they seem to foster a unique relationship with their clients, sometimes even engaging in mutual protection.
Cleaner fish not only remove parasites, but they also provide pleasure, as evidenced by fish visiting cleaner stations up to 144 times a day.
Read at www.theguardian.com
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