Question

Why do fishes die when taken out of water?

Answer 1

Gill respiration in fishes :

1. The gills of bony fishes are housed in a branchial chamber that is protected by a bony operculum.
2. The pharynx is a paired respiratory apparatus found in fishes and certain amphibians.
3. That extracts oxygen from water passing over surfaces within or connected to the walls of the throat.
4. Water passing through the gills of a fish collects oxygen from the outside environment and replaces it with carbon dioxide from the animal's circulation.
5. When fishes are brought out of the water, their gills (respiratory organs) collapse, preventing them from receiving oxygen and eventually killing them.