Question

Which is a true fish as per the biological sysatem of classification-silverfish jellyfish cuttlefish flying fish?

Answer 1

Hey Dear,

◆ Answer -

(D) Flying fish (as it fits in all characteristics of true fishes).

# Characterstics of true fishes -

• Fishes are vertabrates.
• They have gills for respiration.
• They lack limbs & fingers.
• Body is symmetrical & segmented.
• They have true endoskeleton.
• They may/not be cartilaginous.

As for other options,

1. silverfish => insect
2. jellyfish => invertabrate
3. cuttlefish => cephalopod

Hope this helped you somehow. Thanks for asking questions.

Answer 2

Answer:

True fish characteristics as per biological system of classification….are mentioned here below.

Explanation:

You need to keep in mind that fishes are animals that dwell in water habitat. When speaking of true fish, it certainly may have several basic characteristics. This means that over 32,000 different varieties can be classified as true fish. But there still are five most important characteristics that are salient for true fishes only.

1. Gills for breathing – one of the most important characteristics of a true fish is that it should have gills present that are used for breathing. These organs absorb oxygen from water and help fish to breath under water.

2. Scales covered on the skin – As fishes live in water so it is important that the body should be covered with scales. These are shinny covering that covers the body of the fish. It is also important as it makes the fish body water and pressure resistant. They also offer fish with protection against predators.

3. Fins for movement – Fishes do not have limbs for movement. They move in water (swim) with the help of fins present on the body. These may not be having any fixed number or size as it may vary from one fish to another.

4. water habitat – This is most important feature as fishes are only made to survive in water. It takes in food and oxygen from water thus this becomes its prime habitat.

5. Cold blooded animals – Fishes live in water and are thus cold blooded animals. They may to be able to survive environments outside water habitat.

Thus all above mentioned five points are characteristics of a true fish biologically. As flying fish exhibits all these characteristics so it can be called as a true fish.