What makes a fish swim fast?

Answer 1

1. Strong muscles

• The large muscles have a high myoglobin content leading to a higher supply of oxygen to supply the high energy demand
• The rete mirabile elevates the tunas body temperature and muscles can contract three times faster than in other fish

2. Oxygen supply for the muscles

• The large gills increase the oxygen supply
• The gills extract high amounts of oxygen from the water due to the high densities of capillaries.
• Very powerful heart to pump oxygenized blood to the muscles

3. Energy supply

• The rete mirabile elevates the tunas body temperature and thereby the metabolization rate. (Faster digestion, quick travel of nerve impulses, muscles contratc about three times faster than in other fish)

4. Body shape

• The high keeled, sickle shaped tail enables high propulsion
• The streamline, smooth body reduces resistance in the water.
• Tthe pectoral fins can be retracted into a groove
• Gills fit tightly to body

Answer 2

its fins make the fish move faster because it pushes it

Answer 3

Because they have a tail and we have feet... They have been evolving for millions of years to be best suited for swimming

Answer 4

Their fins and hydrodynamic bodies.