External Anatomy Of Fish

Two fins the dorsal and anal are the primary appendages that prevent the fish from rolling over on its side. Fins are appendages used by the fish to maintain position move steer and stop.

Rainbow Trout Drawing Template External Anatomy

For example the ventral aorta located near the heart controls blood flow and the anal fin located on the exterior of the fish helps the perch to swim by working as a steering mechanism.

External anatomy of fish. Allows to fish to dive and also allows the fish to stay in one spot. Fish can detect color. The external parts of a fish.

Gurnards for example can use their pelvic fins for poking around on the seabed and flyingfish use the pectoral fins for gliding over the oceans surface. These are the parts of a fish that enable it to swim although some species have developed their fins for other purposes. Soft cartilage structure that supports the fins of the fish.

Remember that unlike humans whose basic form as a species is upright fish range much more in shape and even in which body parts they have. Here are some of the basic and not so basic external fish parts. Bullet shaped the most common form.

External anatomy fins are used by fish to move through the water but also to steer stop and maintain their position the latter in conjunction with the swim bladder. External anatomy of a fish. Lets start with number 1 which is a bony structure that covers the gills and aids in respiration breathing called the operculum.

Take a look at the fish in the image which is a bony fish. The eyes are rounder in fish than mammals because of the refractive index of water and focus is achieved by moving the lens in and out not reshaping the lens as in mammals. Each part in the internal and external anatomy of a fish serves a purpose in the fishs daily function.

The next structure is the lateral line 2 which like the name implies is a line that follows the length of the fish. But generally speaking theyre similar enough and easy to identify. They are either single fins along the centerline of the fish such as the dorsal back fins caudal tail fin and anal fin or paired fins which include the pectoral chest and pelvic hip fins.

Paired nostrils or nares in fish are used to detect odors in water and can be quite sensitive. The shapes of fish. Helps the fish detect vibration sensors and helps the fish to find food and to navigate to avoid predators.

Bony Fish External Anatomy Diagram Quizlet