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The chondrichthyans are often thought of as primitive compared to bony fishes . Many chondrichthyans, however, have evolved sophisticated adaptations that have made them successful predators over a wide range of habitats.
sense of hearing
The senses of active predators, including many sharks, are especially well developed. A keen sense of hearing allows sharks to locate prey from as far away as 250 meters (800 feet). They are particularly sensitive to low-frequency vibrations such as those emitted by injured animals. Sound is detected through the ears and through the lateral line , a series of fluid-filled canals along the head and sides of the body that contain sensory cells sensitive to vibrations
sense of Sight
. As in many nocturnal mammals, the inside of a shark's eye is covered with a tapetum , a membrane that reflects light back into the eye, making it easier to see in dim light. Unlike most fishes, sharks can reduce and expand their pupils. In some species, the eyes are protected during feeding by the nictitating membrane, a structure similar to an eyelid.
sense of smell
The Elasmobranchi group has external nostrils on the lower side of the body; because of them, sharks can detect tiny concentrations of substances such as blood, which allows them to scent prey from distances of several hundred feet. Finally, sharks can detect electrical signals via the ampullae of Lorenzini, which are specialized organs distributed over a shark's head that detect changes in electrical currents. Sharks use these to sense the electrical fields emitted by the heart and muscles of their prey.
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What are the three types of fish?
The three main types of fish are bony fish, cartilaginous fish, and jawless fish. Bony fish have skeletons made of bone, cartilaginous fish have skeletons made of cartilage, and jawless fish lack true jaws. Each type of fish has unique characteristics and adaptations to their environments.
What are the three types of fish made of?
the three types of fish are jawless, bony, and cartilaginous. the bony fish is made of bones, and the cartilaginous and jawless fish are made of cartilage
What are three major groups of fishes?
Jawless fish, cartilaginous fish, and bony fish.
Is a tuna fish cartilaginous fish?
no. cartilaginous fishes are sharks and rays.
Do cartilaginous fish have operculum?
Jawless fish are cartilaginous, but they do not have jaws. Class Chondrichthyes, which contains most cartilaginous fish, like sharks, have powerful jaws.
Which fish can stay underwater the longest cartilaginous or bony fish?
it is the cartilaginous fish.s
Are skates cartilaginous fish or bony fish?
Similar to Stingrays, skates are cartilaginous.
What are three groups of fishes?
Three basic fish groups: Cartilaginous Fish - Chondrichthyes Fay-Finned Fish - Actinopterygii (over 23,000 species) Lobe-Finned Fish - Sarcopterygii
What are the differences between jaw less fish and cartilaginous fish?
Jawless fish and cartilaginous fish have cartilaginous skeletons, and bony fish have skeletons made from bone. Cartilaginous fish and bony fish both have jaws, paired appendages, and whole vertebrae, and jawless fish lack jaws, paired appendages, and often are without whole vertebrae. Cartilaginous fish can have scales or be naked, jawless fish are naked, and bony fish have scales. Bony fish have swim bladders, and cartilaginous fish do not. Jawless fish, cartilaginous fish, and bony fish all have fins, gills, and dorsal nerve cords that lead to a distinct brain. They all also have postanal tails and notochords.
Like jawless fish cartilaginous fish have sketetons made of?
Both jawless fish and cartilaginous fish have skeletons made of cartilage.
Is lizard bony or cartilaginous?
Lizards are not bony or cartilaginous fish, they are reptiles.
What does cartilaginous mean?
Cartilaginous fish have cartilaginous endoskeletons, meaning their skeletons are made from cartilage. Cartilaginous fish can also have placoid scales, or they are naked. Cartilaginous fish have gills, paired appendages, strong jaws, notochords, a dorsal nerve chord that leads to a distinct brain, and lack a swim bladder.
