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Why do fish have scales?

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Why do fish have scales?

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Some fish have scales, like carp. and goldfish. most fish have slime to protect them.

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Many fishes have scales but clingfishes do not have. Their body has a layer which is called mucous. Scales on the fish body helps fish in some ways like:- Firstly it acts as a protective layer so that harmful objects, fungus, bacteria and parasites cannot enter the fish body Secondly they are present in overlapping pattern and only small part of scale is visible which makes the fish body smooth but itself the scales are hard. Scales allows the fish to move easily in vertical and horizontal direction in water. It’s designing is in such a way that the water can easily slide over the body of fish and it faces no obstacles or resistance while swimming. The smoothness that it provides to fish body helps to maintain the speed through water. Think if the fish have hair on their body then they will not be able to swim properly because the hair might have resisted them to swim. Thirdly it makes the fish body flexible for the movement. Fish body doesn’t lose the scales in natural way but the

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(m) Do all fishes have scales? No. Many species of fishes lack scales. All the clingfishes (family Gobiesocidae) for example, are scaleless. Their bodies are protected by a thick layer of mucous. Why do fish have scales? The primary purpose of scales is to give the fish external protection. How many types of scales are there? There are four main kinds of scales and numerous variations of each kind. Placoid Cosmoid Ganoid Cycloid and Ctenoid Different fishes, different scalation It is interesting to think about the lifestyle and habitat of a fish, then look at its scales. In the Shark Scale Brain Teaser, the scales of five shark species are shown, two are slow swimming bottom-dwelling sharks, one is a generalist predator, and two are fast swimming pelagic species. Can you work out which scale belongs to each shark? Are all scales the same size? No. Scale sizes vary greatly between species. Some fishes, such as the freshwater eels have tiny embedded scales. Fishes such as the tunas have

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Fish has scales as external protection, but some species are covered by scutes and others have no outer covering on the skin and are called naked fish

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The scales on a fish’s body protect it from predators, parasites and sharp rocks as they form a flexible armour coating. The rows of scales bend with the swimming movements of the fish to make a streamlined body over which the water flows smoothly. Scales are also used to store essential minerals, such as calcium, which are absorbed when needed. What are endemic fish? Endemic fish are fish that are restricted to certain areas because of water temperature or tides. How do you tell the age of a fish? Regular rings are laid down on the scales. If they are laid down once a year then it is easy to tell the age of the fish. How do the different fish feed? Steenbras blow prey out of the sand. The Baardman uses a chin barbel and Gurnards use modified rays of the pectoral fin to find buried food. Mullet sieve plankton from the water using rakers on their gills. Rays and Sand sharks trap food under their flattened bodies and feed from ventral mouths. Musselcrackers and Sand sharks crush shellfis

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