Frequent question: What are some of fish physical characteristics?

With the exception of some primitive species, most fish have common characteristics that include gills, scales, fins and bony skeletons. Some characteristics that differentiate fish include the shape of their heads, where their mouths are located, fin type and location, and average adult size.

What are the characteristics of life of a fish?

These characteristics include: Live in water their entire lives. Vertebrates have a backbone, and some cartilaginous fish have vertebrae made of cartilage rather than calcium-hardened bone. Gills, which are slits on both sides of fish that allow for respiration, or the exchange of oxygen and carbon dioxide.

What physical characteristics help fish live in water?

The features which help fishes to adapt to live in water:

  • Streamlined, spindle-shaped body which is covered with scales. …
  • Skeleton is made up of thin bones with the flexible backbone.
  • Flat fins and tails to help them swim, change direction and to keep the body balanced.

What are four characteristics of fish?

All fish have backbones (vertebrae) for support and movement. 6. Suggest that students memorize the initials “WGFB” to assist them in remembering the four main traits of fish: “Water, Gills, Fins, Backbone.”

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What is the body shape of fish?

Bony fishes show great variety in body shape, but the “typical” fish body shape is roughly cylindrical and tapering at both ends. This characteristic fusiform shape is quite energy efficient for swimming.

What are 5 characteristics of fish?

5 Characteristics That All Fish Have in Common

  • All Fish Are Cold-Blooded. All fish are cold-blooded, which is also called ectothermic. …
  • Water Habitat. Another shared characteristic amongst all fish is that they live in water. …
  • Gills to Breathe. …
  • Swim Bladders. …
  • Fins for Movement.


What is the primary characteristic of fish?

Unlike mammals, fish are cold-blooded (ectothermic). This means that they do not maintain a constant internal body temperature; instead, their temperature is greatly influenced by their environment. True fish have a backbone and fins. Most also breathe with gills and have scales that cover their bodies.

What is special about a fish?

As members of the phylum Chordata, fish share certain features with other vertebrates. These features are gill slits at some point in the life cycle, a notochord, or skeletal supporting rod, a dorsal hollow nerve cord, and a tail.

What is fish behavior?

Specialized behaviour is primarily concerned with the three most important activities in the fish’s life: feeding, reproduction, and escape from enemies. … The mode of communication may be visual, as between the small so-called cleaner fish and a large fish of a very different species.

What helps the fish to live 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.

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What are 10 characteristics of fish?

10 Essential Facts About Fish

  • of 10. There Are Three Main Fish Groups. …
  • of 10. All Fish Are Equipped With Gills. …
  • of 10. Fish Were the World’s First Vertebrate Animals. …
  • of 10. Most Fish Are Cold-Blooded. …
  • of 10. Fish Are Oviparous Rather Than Viviparous. …
  • of 10. Many Fish Are Equipped With Swim Bladders. …
  • of 10. …
  • of 10.


What is the role of a fish?

Fish play an important role in nutrient cycles because they store a large proportion of ecosystem nutrients in their tissues, transport nutrients farther than other aquatic animals and excrete nutrients in dissolved forms that are readily available to primary producers.

What are the 3 classes of fish?

Fishes are typically divided into three groups: superclass Agnatha (jawless fishes), class Chondrichthyes (cartilaginous fishes), and superclass Osteichthyes (bony fishes).

Do fish have feelings?

Animal Magnetism

Because fishes lack faces like ours, we assume that their mask-like features mean they do not experience feelings. And because fish cannot cry out, we interpret their silence as meaning they do not perceive pain—even as their gasping mouths and flopping fins on a ship’s deck indicate otherwise.

Which fish have an unusual body shape?

Elongated shape fish include eels and pipefish and trumpet fish. Their shape is ideal for moving in and out of narrow spaces, rocky coral reefs, and vegetated areas. Unusual shaped fish are usually very slow moving and have a unique body shape. These fish include seahorses, pufferfishes, and stonefish.

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Why do the fish has 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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