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.

What unique adaptation allows walking catfish to survive on land?

• They can absorb oxygen through their skin.

• They have a special type of gills.

• They use lung-like organs to breathe air.

• They have waterproof scales.

In the experiment, what did walking catfish avoid when navigating towards water?

• The scent of other fish

• The scent of fresh water

• The smell of hydrogen sulfide

• The aroma of flowers

How do walking catfish primarily detect bodies of water?

• By using their sense of touch

• By using their sense of hearing

• By using their sense of taste

• By using their sense of sight

What is a potential reason walking catfish might 'sniff' with their lungs?

• Their gills are adapted for air.

• Their lungs are more sensitive to smells.

• Their nasal tissues can't move air effectively.

• Their nostrils are too small.

Why is understanding the navigation of walking catfish important for wildlife managers?

• To improve fish farming techniques

• To control invasive populations

• To enhance aquarium designs

• To develop new fishing methods