In a fascinating revelation, researchers have identified three fish species in the Laccadive Sea, off the southwest coast of India, exhibiting tool-using behaviour. This discovery challenges the conventional perception that fish lack intelligence and showcases their remarkable abilities.
The Jansen’s wrasse (Thalassoma jansenii), the checkerboard wrasse (Halichoeres hortulanus), and the moon wrasse (Thalassoma lunare) were observed using live or dead coral structures as anvils to crack open the hard shells of sea urchins, revealing the edible parts within. This marks the first documented instance of the moon wrasse using tools in the wild, adding to our understanding of fish behaviour.
Published in the journal Coral Reefs in February, this study contributes to the increasing number of reports on tool use in animals. While human tool use is sophisticated, the prevalence of tool use in the animal kingdom is more widespread than previously thought.
The discovery was accidental, occurring during a study of burrowing sea urchins off the coast of Kavaratti, Lakshadweep. Underwater cameras captured the fish using innovative methods to overcome the challenges posed by the spiny armour and hard shells of the sea urchins.
Unlike primates and birds, fish lack hands or claws, presenting a unique challenge for tool use. However, the wrasses displayed skilful behaviours, using their snouts to manipulate the urchins before striking them against corals to access their prey.
This remarkable behaviour highlights the adaptability and intelligence of fish species, challenging traditional notions of cognitive abilities in aquatic animals. As research continues, we can expect further insights into the complex behaviours of marine life.
Source-The Hindu
