Dogfish Shark

Dog Fish Shark

Dogfish sharks are the second largest sharks, there body shape is rounded. Dogfish sharks have a variety of different parts. Smell, taste, hearing, sight, touch, and electroreception are six sensory systems that sharks use. All of there senses allow them to explore the environment and survive. There senses help them locate prey, avoid danger, and also find mates. Sharks nostrils or nares are under the edge of there snout. There nares are separate from there mouth and throat, they are uses exactly for olfaction. Each nare is divided into two parts by a nasal flap. The flaps increase surface area, and provide the shark with a better opportunity of smell. When sharks detect a smell that they want to investigate or eat, the swim in the direction it is coming from and move its head back in forth. The nares also detect chemicals in the water. The sharks eyes are highly sensitive to light intensity, they can also control the amount of light entering the eye by dilating there pupils. For a shark to focus its controlled by the rectus muscles, this pulls the lens closer or further away. Sharks possess great vision in dim light conditions. Sharks have an upper and lower eyelid but they usually don’t meet, so it doesn’t necessarily protect the eye. The dogfish sharks mouth is located underneath it. Spiracles located behind the eye on top of the head are used to provide oxygenated blood directly to the eye. The dogfish teeth are extremely sharp of coursed used for biting into its prey, the sharks tongue is rough for helping hold its prey. They eat squid, fish, and crustaceans. The dogfish shark as of all sharks have been around for as long as dinosaurs. If the shark is a female the uterus is the function of the egg developments, if a boy there is testes an oval shaped; dorsal to the liver. Males have claspers finger-like projections that assist in sperm transfer during mating, this occurs only in males. Ovaries are two