What is the function of the mouth of a fish?

The mouth serves for taking in food; also for the breathing current of water. Some fish have a wide gape, and filter microscopic plants and animals out of the surface waters as they swim along, trapping them in gill rakers before the water is expelled from the operculum.

What is mouth in fish?

Most fish mouths fall into one of three general types: Superior, or sometimes called supra-terminal, mouths are upturned. Terminal mouths point straight forward and are the most common mouth type. Inferior, or sub-terminal, mouths are turned downward.

What are the parts of a fish and their functions?

External Fish Anatomy

  • Fins. Fins are appendages used by the fish to maintain position, move, steer and stop. …
  • Scales. Scales in most bony fish — most freshwater fish other than gar that have ganoid scales, and catfish which have no scales — are either ctenoid or cycloid. …
  • Gills. …
  • Eyes. …
  • Nares. …
  • Mouth. …
  • Lateral Line. …
  • Vent.
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Where is a fish’s mouth?

Most fish have their mouth located in the front of the head pointing forward. This is called a Terminal Mouth. Fish with a terminal mouth generally eat in the water column or mid-water feeder and both their jaws are generally the same length.

How mouth types can help determine the feeding behavior of fishes?

Fish that have terminal or protrusible mouths generally feed on other fish. Fish that have superior mouths are generally ambush predators, meaning they generally are hidden and wait for fish to come close to them before they strike.

What are the 4 types of fish scales?

There are four types of fish scales – placoid, cycloid, ctenoid (pronounced ‘ten-oid’), and ganoid.

What is Protrusible mouth?

protrusible mouth (protractile mouth)

In fish, a structural arrangement of the jaws that enables the animal to protrude (extend) or withdraw the mouth at will. When fully protruded, the cavity of the mouth is enlarged to form a funnel-like space facilitating the uptake of food…. …

What are 3 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 are the basic parts of the fish?

Internal Fish Anatomy

  • Spine: The primary structural framework upon which the fish’s body is built; connects to the skull at the front of the fish and to the tail at the rear. …
  • Spinal Cord: …
  • Brain: …
  • Lateral Line: …
  • Swim (or Air) Bladder: …
  • Gills: …
  • Kidney: …
  • Stomach and Intestines:
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What are the main parts of a fish?

What are the main parts of a fish? The main parts on the outside of a fish are the gills (for breathing), the fins (for swimming and steering), and the lateral line (for detecting movement nearby).

Are any fish smart?

“Fish are more intelligent than they appear. In many areas, such as memory, their cognitive powers match or exceed those of ‘higher’ vertebrates including non-human primates.” Fish’s long-term memories help them keep track of complex social relationships.

Can a fish move its tongue?

The bone’s making the right sort of movements, even if there’s no muscular organ attached to it. PS: Fish do have “tongues” but the term is a loose parallel; unlike our muscular organs, these tongues (usually) can’t stick out of the mouth, and they don’t help with swallowing.

What fish have human teeth?

The remains of the sheepshead fish were found by a family on St. Simons Island off the coast of Georgia. The fish is known for its rows and rows of human-like teeth. The teeth are horrifying.

What types of fish have barbels?

Fish that have barbels include the catfish, the carp, the goatfish, the hagfish, the sturgeon, the zebrafish, the black dragonfish and some species of shark such as the sawshark. Barbels house the taste buds of such fish and are used to search for food in murky water.

What type of fish has big lips?

The big-lip damselfish is a species of ray-finned fish from the family Pomacentridae, it is the only species in the monotypic genus Cheiloprion.

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Big-lip damselfish
Class: Actinopterygii
Family: Pomacentridae
Subfamily: Pomacentrinae
Genus: Cheiloprion M.C.W. Weber

How can fish age be determined?

Biologists estimate fish age by counting these opaque zones, called annuli, just as one would count rings on a tree to determine its age. For each species to which it is applied, the method of estimating age by counting annuli must be validated to prove that one whole annulus is equal to one year of growth.

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