Image Recognition
Fish have self-recognition via photos, as recorded for the first time in animals, according to a research team. By eating parasites and dead skin, cleaner fish keep fish tanks clean and act as housekeepers for the other fish species. Also Read: Catfish Injected with Alligator DNA Could Live Longer, Experiment DemonstratesCleaner Fish and PhotosFour photos were shown to each cleaner fish: one of themselves, one of a different cleaner fish, one of their face on the body of a different cleaner fish, and a fourth of the face of a different cleaner fish on their own body. It's interesting to note that the cleaner fish attacked pictures of unfamiliar or unknown cleaner fish but not ones of themselves. The same fish did not rub their throats when photos of them without parasite marks or a well-known cleaner fish with parasite marks were shown to them, Science Daily reports.