What is the difference between a fish and dolphins breathing?

The biggest difference between fish and dolphins breathing lies in how they obtain oxygen:

* Fish: Use gills to extract oxygen dissolved in water. They breathe by drawing water over their gills, where tiny blood vessels absorb the oxygen.

* Dolphins: Are mammals and breathe air through lungs. They need to surface regularly to take in air.

Here's a breakdown of the key differences:

Fish:

* Aquatic: Live entirely in water.

* Gills: Respiratory organs for extracting oxygen from water.

* Constant breathing: Gills are constantly working to extract oxygen.

Dolphins:

* Aquatic mammals: Spend most of their time in water but need to come to the surface for air.

* Lungs: Respiratory organs for breathing air.

* Intermittent breathing: Dolphins need to surface regularly to breathe air into their lungs.

Let me know if you'd like to know more about how dolphins breathe or how their lungs work!