#gills

waves How do fish breathe underwater?

Fish are aquatic animals that breathe underwater through a process called respiration. Unlike humans and other mammals, fish cannot extract oxygen... Read more

water How do crabs breathe underwater?

Crabs and other crustaceans have adapted to their underwater environment in a number of ways, one of which is how they breathe. Unlike humans, who... Read more

ac_unit Can you tell the age of a fish by the size of its gills?

The size of a fish's gills cannot be used to accurately determine its age. While the size of a fish's gills does change as it grows, it is influenced... Read more

pets Can you tell the age of a salamander by the size of its gills?

The size of a salamander's gills cannot be used to accurately determine its age. While a salamander's gills do change as it grows, there are many... Read more