Wild fish can recognize human divers

Fish, often overlooked in the realm of “smart” animals, have been shown to have the ability to recognize human faces in laboratory settings. However, there is limited scientific evidence on how well fish can distinguish individual humans in their natural habitat.

At a research station in the Mediterranean Sea, a team of scientists noticed certain fish displaying unique behavior towards specific divers. These fish would follow a particular diver, who had previously fed them, while ignoring other divers. This observation led to a series of experiments to investigate the fish’s ability to differentiate between individual humans.

The study conducted by researchers from the Max Planck Institute of Animal Behavior in Germany revealed that some fish could indeed recognize different divers based on their dive gear. The findings were published in the journal Biology Letters on February 18.

Following the leader

The experiments took place in the Mediterranean Sea, where wild fish populations have become accustomed to human presence. The researchers trained the fish to follow a specific diver by using visual cues and food rewards. Over time, the fish learned to distinguish and follow the trained diver.

Among the various fish species in the area, sea bream showed the most interest and engagement in the training sessions. The researchers were able to establish a bond with individual fish, such as Bernie and Alfie, who displayed unique physical traits.

After a training period, the fish were able to distinguish between different divers based on visual cues. This ability set the stage for further experiments to test the fish’s recognition skills.

Upping the ante

In subsequent trials, the fish demonstrated the capacity to differentiate between two divers based on their dive gear colors. The results indicated that the fish associated specific colors with each diver, allowing them to make informed choices.

The study highlighted the fish’s ability to learn and adapt to visual cues, suggesting that they possess a level of intelligence that is often underestimated. The researchers emphasized the importance of acknowledging and understanding the cognitive abilities of marine animals like fish.

‘It’s time for us to see them’

The study shed light on the intricate relationship between humans and fish, showcasing the potential for mutual recognition and understanding across species. The researchers emphasized the need to acknowledge and appreciate the cognitive capacities of underwater creatures like fish.