Why do male fish provide parental care?

How do bony fishes protect their young?

Some bony fishes bear live young that can protect themselves at birth. Very little, if any, parental care is needed after young are released. Some species care for their young after they have hatched. Male bowfins (family Amiidae) fiercely guard their young. Some species make elaborate nests and provide parental care to the developing fishes.

What are the characteristics of a bony fish?

In most species, the gills are protected by a flexible plate called an operculum. Most bony fishes have a single pair of gill openings. Some bony fishes such as eels (family Anguillidae) have a pair of gill holes or pores that aren’t covered by an operculum. The nostrils of most bony fishes have no connection with the mouth or gills.

What is the difference between a bony and cartilaginous fish?

Bony fish have skeletons that are made up of hard, brittle, highly calcified bones – just like your own bones – whereas cartilaginous fish have skeletons that are made up of cartilage that is thin and flexible, just like the material that gives your nose its shape.

What are the main features of a bony fish?

What are the features of bony fish? Bony fish are members of the class osteichthyes, and are defined by their calcified skeleton, hinged jaw, gill arches, gill filaments, and gill rakers. They also have an operculum for pumping water across the gills and swim bladders to control buoyancy, as well as mucous-lined scales.

Which of the following is the largest cartilaginous fish?

The largest cartilaginous fish is whale shark that weighs 21.5 tonnes. Basking shark, great white shark, thresher shark, rays, skates, and Southern stingray are some examples of cartilaginous fish. The gills of the cartilaginous fish open to the ocean through slits.

What is the difference between bonefish and cartilaginous fish?

Another difference between the bony and cartilaginous fish is in how each class produces red blood cells. In bony fish, the red blood cells are produced in the bone marrow, the central part of the bone.

What are the key terms for bony fish?

Key Terms: Actinopterygii, Bony Fish, Cartilaginous Fish, Elasmobranchii, Endoskeleton, Fusiform, Lobe-Finned Fish, Ray-Finned Fish, Sarcopterygii, Teleostomi Bony fish refers to a large class of fish distinguished by a skeleton of bone. The divergence of bony fish and cartilaginous fish occurred about 420 million years ago.

What is another name for a bony fish?

Alternative Titles: Osteichthyes, Pisces, teleostome. Bony fish, any member of the superclass Osteichthyes, a group made up of the classes Sarcopterygii (lobe-finned fishes) and Actinopterygii (ray-finned fishes) in the subphylum Vertebrata, including the great majority of living fishes and virtually all the world’s sport and commercial fishes.

Where are placoid scales found in cartilaginous fish?

Teeth-like placoid scales are found on the skin of cartilaginous fishes. In cartilaginous fishes, exchange of gas takes place through gills. Most cartilaginous fishes have colour vision.

Which statement is true about cartilaginous fishes?

Their bodies are covered with an exoskeleton of placoid scales and they have gills that help in respiration. However, cartilaginous fishes do not have a color vision. So, the correct answer is ‘Most cartilaginous fishes have color vision.’.

Do cartilaginous fishes have color vision?

Most of the cartilaginous fishes have sense organs mediating vision, olfaction, gustation, lateral line, electroreception, and audition. Their bodies are covered with an exoskeleton of placoid scales and they have gills that help in respiration. However, cartilaginous fishes do not have a color vision.

What are the bones of fish called?

Numerous other small bones support the rays of the fins. We can classify the fish into two large groups that are quite different from one another: condrictes (cartilaginous fish) and osteitis (bony fish). Despite some glaring differences, it is common to make mistakes by differentiating the two groups.

Are catfish bony fish?

Catfish are bony fish. What Are Bony Fish? Bony fish, also known as Osteichthyes, is a group of fish that is characterized by the presence of bone tissue. The majority of the fish in the world belong to this taxonomic order, which consists of 45 orders, 435 families, and around 28,000 species.

What is the classification of bone fish?

Osteichthyes (bony fishes) Class Actinopterygii (ray-finned fishes) Fins supported by rays of dermal bone rather than by cartilage. A group of jawed fishes so diverse that no single definition for them can be derived; better understood by determining the distinctive characters of the primitive members and…

What is the scientific name of a fish?

Scientific Name: Osteichthyes, Actinopterygii, Sacropterygii. Common Names: Bony fish, ray-finned and lobe-finned fishes. Basic Animal Group: Fish. Size: From below a half inch to 26 feet long. Weight: Well under an ounce to 5,000 pounds. Lifespan: A few months to 100 years or longer.

Why do sharks have placoid scales?

The placoid scales are found only in cartilaginous fishes (elasmobranchs) i.e. sharks and rays. The skin of sharks is entirely covered by placoid scales which are tough microscopic structures covered with hard enamel. Placoid scales are packed tightly together and grow with their tips facing backwards. This gives the fish’s skin a rough feel.

What is the difference between cartilage fishes and bony fishes?

Cartilage fishes characteristically have placoid scales whereas Bony fishes have ctenoid and cycloid scales. Amphibians generally do not have scales. Was this answer helpful?

Which type of scales are found on the skin of fish?

Which type of scales are found on skin of cartilaginous fishes? Cartilaginous fishes (like sharks and rays) are covered with placoid scales. Most bony fishes are covered with the cycloid scales of salmon and carp, or the ctenoid scales of perch, or the gonoid scales of sturgeons and gars.

What is the difference between placoid and cartilaginous scales?

Such scales are found only in cartilaginous fish (Chondrichthyes) but are absent in the subclass Holocephali. The scales cover the skin like sand grains. Placoid scales are arranged in different rows individually to form the outer skeleton. At the bottom of each scales is a base plate and a pointed thorn arising from the base.

What are the characteristics of cartilaginous fish?

In cartilaginous fishes, exchange of gas takes place through gills. Most cartilaginous fishes have colour vision. Most of the cartilaginous fishes have sense organs mediating vision, olfaction, gustation, lateral line, electroreception, and audition.

Why do sharks have cartilaginous bones?

Generally speaking, fish like sharks and stingrays make up the class of cartilaginous fish. Having a skeletal system made out of cartilage is advantageous because cartilage is typically very lightweight and flexible, while also incredibly strong.