Catfish Walking on Land Find Water by its Smell

Walking catfish, native to southeastern Asia, can survive on land for up to 18 hours by using lung-like organs. They navigate by detecting water bodies through scent, as shown in a study where they were drawn to pond scents but avoided hydrogen sulfide. Their orientation relies more on taste than smell, with taste buds covering their bodies. Despite having nostrils, they likely use their lungs to 'sniff' air. Genetic studies suggest they have extra smelling genes, which may help them recognize airborne chemicals. Understanding their navigation could aid in managing invasive populations.

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