Select from the frequently asked questions below
- Fish are aquatic vertebrates.
- They make up more than half of all vertebrate species.
- Many structures in fish are adaptations for their aquatic lifestyle.
- Fish have gills that allow them to breathe oxygen in water.
- They are typically long and narrow, which reduces water resistance when they swim.
- Fish also have a centralized nervous system with a brain.
What is the difference between fish that are facultative air breathers and fish that are obligate air breathers?
How is the body temperature of ectotherms related to environmental temperatures? How does this differ from endotherms?