Why is it easier for the fish to swim in water class 8?

Fish can easily swim in water because it has a streamlined body which produces less friction. So it easily cuts through water and moves in it very easily.

Why is it easier for the fish to swim in water?

Answer: Fish swim by flexing their bodies and tail back and forth. Fish stretch or expand their muscles on one side of their body, while relaxing the muscles on the other side. This motion moves them forward through the water.

What helps fish move in water?

Fish swim by flexing their bodies and tail back and forth. Fish stretch or expand their muscles on one side of their body, while relaxing the muscles on the other side. This motion moves them forward through the water. Fish use their back fin, called the caudal fin, to help push them through the water.

How does fish moves in water?

During swimming, the front part of the body curves on one side and tail on the opposite side. Then, quickly it turns to the opposite side. This provides a jerk and pushes the body in forwarding direction. It is repeated for movement in forwarding direction.

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How do fish learn to swim?

Fish evolved to swim in schools to better protect themselves from predators, improve their foraging and swim more efficiently. Unlike shoaling, in which fish merely swim loosely together, schooling requires coordinated body positions and synchronized movement.

What shape moves faster in water?

A streamlined shape moves faster through water than other shapes. This is because it can cut through the water more efficiently than other shapes.

Which is the fastest fish?

Not all experts agree, but at top speeds of nearly 70 mph, the sailfish is widely considered the fastest fish in the ocean. Clocked at speeds in excess of 68 mph , some experts consider the sailfish the fastest fish in the world ocean.

What organ helps fish swim?

Swim bladder, also called air bladder, buoyancy organ possessed by most bony fish. The swim bladder is located in the body cavity and is derived from an outpocketing of the digestive tube.

How does a fish move in water class 6?

Fishes swims by moving its body and tail in opposite direction to each other, they stretch the body and relaxing the tail in opposite direction this forms a curve, then quickly the body moves other side and the tail on the opposite this creates the jerk and pushes the fish in forward direction.

Do fishes sleep?

While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest.

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Can a fish survive in milk?

No, fish cannot survive in milk. Fish cannot breathe properly in milk due to low dissolved oxygen and the presence of impurities in milk. Therefore, fish may drown in milk within a few minutes. … These fish gills help to extract oxygen from water.

Can a fish swim backwards?

– The vast majority of fish swim forwards but most have the ability to swim backwards as well. … Commonly the fish that swim backward are species such as the eel who use anguilliform (eel-like) locomotion to move their elongated bodies. Gobies are a perfect example of this.

What are the different fins of a fish called?

Fins are appendages used by the fish to maintain its position, move, steer and stop. They are either single fins along the centerline of the fish, such as the dorsal (back) fins, caudal (tail) fin and anal fin, or paired fins, which include the pectoral (chest) and pelvic (hip) fins.

Why do fish swim side to side?

The fish seem comfortable swimming this way near the structures, but they will swiftly turn right side up when they swim away. … Their behavior is the result of a bottom-dwelling fish adapting to take advantage of oxygen-rich water near the surface.

Are all fish born swimming?

Surely, you think, fish must be born as expert swimmers. … “Many fish larvae hatch without fully formed pectoral fins and all hatch without a swimbladder, so similar problems could occur for them”, predicts Müller.

Why do fish have this shape?

A fish is shaped for where it lives and how it feeds. A fish with a torpedo shape can swim quickly through the water. A fish that is flat can easily hide on the bottom of the water. … A fish’s mouth shape is adapted to the food it eats.

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