Fish Anatomy

Tall bodied laterally compressed species like Discus and Angelfish are adapted to life in slow-moving waters. Nearly all fish have a streamlined body plan which is divided into head trunk and tail although the dividing points are not always externally visible.

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Each variety is adapted to its own specific habitat.

Fish anatomy. The otoliths allow fish to sense sounds in the water. Tall bodied fishes are adapted to slow moving waters. There are 63 to 75 scales in a lateral line.

Lets take a look at each below. This lateral line system enables the fish to detect differences of pressure in the water. They are either single fins alonthe centerline of the fish such as the dorsal back fins caudal tail fin and anal fin or pairedfins which include the pectoral chest and pelvic hip fins.

Surface dwelling fish have an upturned mouth a flattened back. Fish use their sense of smell to locate food and to aid in migrating. Approximately 22000 species of fish began evolving 480 million years ago.

The overlapping slates of the roofs in the mountain village resembled fish scales. Lets start with number 1 which is a bony structure that covers the gills and aids in respiration breathing called the operculum. The size of sexually mature platy-fish has a mean anterior posterior length of 4729 micra with mean width of 178 micra and mean depth of 360 micra.

Sight hearing and smell. Fish anatomy is the study of the form or morphology of fishesIt can be contrasted with fish physiology which is the study of how the component parts of fish function together in the living fish. Examples of Fish Anatomy When stocking a pool with fish take care to select healthy individuals with the firm meaty bodies and erect dorsal fins.

The largemouth bass illustrated above has the typical torpedo-like fusiform shape associated with many fishes. The anatomy of fish is determined by the characteristics of water which is much denser than air has less dissolved oxygen and a greater absorption of light. The nostrils of fish are used for the sense of smell.

Fisheries biologists can also use these bones otoliths to age fish and determine the health of fish populations. So it becomes a necessity to know about the external anatomy of a fish first. The skin of most fishes is covered with scales which in many cases are animal reflectors or produce animal coloration.

Fish come in many shapes colors and sizes. Bottom-dwelling fish have flattened bellies and inferior mouths. The shape of the fish helps the aquarist to determine the fish habitat.

Fish in almost all cases have two paired and three unpaired fins. Fish also have single unpaired fins along the centre line such as the dorsal back fins anal fin and caudal tail fin. But also because they live in water they can sense transverse waves generated by motion and so they have evolved a lateral line system to do this.

Male glands are smaller than those of females. Fish anatomy is primarily governed by the physical characteristics of water which is much denser than air holds a relatively small amount of dissolved oxygen and absorbs light more than air does. Fishes such as catfish have anotherfleshy lobe behind the dorsal fin called an adipose fat fin that is not illustrated here.

Fish are animals that are cold-blooded have fins and a backbone. PowerPoint PPT presentation. In practice fish anatomy and fish physiology complement each other the former dealing with the structure of a fish its organs or component parts and how they are put together such as might be.

The shark has a pair of dorsal fins and pectoral fins. Slender torpedo shaped fish are better adapted to moving waters. The pituitary is an oval body and is compressed dorsoventrally.

Fish Anatomy Anatomyphysiology Digestive glands in the salmon and trout include the gastric and intestinal glands the liver and the pancreas. Fish have internal ears with pairs of inner ear bones called otoliths. Almost all fish have an aerodynamic body which is divided into head trunk and tail although the dividing points are not always easy to distinguish.

But all bony fish fish that have a bony skeleton as opposed to sharks and rays whose skeletons are made of cartilage have the same basic body plan. The basic anatomy of a fish Like all creatures fish need to perceive the world they live in and thus we find they have senses. The paired pectoral and pelvic ventral fins correspond respectively to the arms and legs of human beings and connect with bony girdles in the body that correspond to our own pectoral and pelvic girdles.

Take a look at the fish in the image which is a bony fish. Most fish have scales and breathe with gills. The dorsal and ventral anal fins play an important role by acting as stabilisers without them the fish would roll over on its side.

Internal fish anatomy consists of the brain spine spinal cord swim bladder kidney stomach and intestines vent liver heart gonadseggs muscles and pyloric caeca. Fish_Anatomypdf - Google Drive. For example surface dwelling fish have a reversed mouth and a compressed back.

There are thought to be over 20000 species of marine fish.

Fish Index Internal Anatomy Of A Bony Fish Fish Anatomy Anatomy Fish