How does fish move in water? What do they do to obtain oxygen?

Explanation

**Step-by-Step Solution:**

1. **Body Shape Adaptation:**
- Fish have a body shape that is specifically adapted for swimming in water. This shape is often described as "boat-shaped" or "streamlined."
- The streamlined shape reduces water resistance, allowing fish to move more efficiently through the water.

2. **Movement Mechanism:**
- Fish move by using their fins and tail. The tail fin (caudal fin) provides propulsion, while the pectoral and pelvic fins help with steering and balance.
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