Some bony fish are hermaphrodites, and a number of species exhibit parthenogenesis. Fertilization is usually external, but can be internal. Development is usually oviparous (egg-laying) but can be ovoviviparous, or viviparous.
Are bony fishes oviparous or viviparous?
Oviparous bony fishes release eggs, and the developing embryo is nourished by a yolk sac. The eggs of a bony fish generally are spherical. A soft membrane protects the egg.
Which fish is viviparous?
Among bony fish, viviparity is a characteristic of eelpouts (Zoarces viviparus], bass (Sebastes), Baikal oil-fish (Comephorus baicalensis), many fish of the family Cyprinodontidae (four-eyed fish— Anableps tetrophthalmus], and some freshwater fish of the family Hemirhamphidae.
Are cartilaginous fishes viviparous?
All cartilaginous fish have internal fertilization. Some species are oviparous, or egg-layers, and some are ovoviviparous, hatching the eggs within the female and giving birth to live young.
Are most bony fish oviparous?
Approximately 90% of bony and 43% of cartilaginous fish are oviparous (See Types of Fish). In oviparous fish, females spawn eggs into the water column, which are then fertilized by males. For most oviparous fish, the eggs take less energy to produce so the females release large quantities of eggs.
Which is viviparous animal?
Viviparous animals give birth to living young that have been nourished in close contact with their mothers’ bodies. Humans, dogs, and cats are viviparous animals. Viviparous animals differ from egg-laying animals, such as birds and most reptiles.
Which of the following are viviparous?
This option is most relevant and correct as we have seen both bats and whales are viviparous. They give birth to their young ones which are grown and nourished inside the female body.
Which bird is viviparous?
Option ‘A’ is ostrich: These are the spices of large flightless organisms, which are famous for their eggs. Because these birds lay the largest egg of the world.
What are viviparous animals give two examples?
Answer : The animals which give birth to young ones are called viviparous animals. Human beings and cow are examples of viviparous animals.
Are all mammals viviparous?
All mammals except the platypus and the echidnas are viviparous. Only these two unusual mammals, called montremes, lay eggs. Some snakes, such as the Garter snake, are viviparous. … Although certain snakes give birth to live young, they are not viviparous.
How are cartilaginous and bony fish similar?
Similarities Between Bony Fish and Cartilaginous Fish
Both bony fish and cartilaginous fish have an endoskeleton. Both bony fish and cartilaginous fish breath through gills. Both bony fish and cartilaginous fish possess a mouth with jaws. Both bony fish and cartilaginous fish have paired fins.
Which are exclusively viviparous bony fishes?
fish that give birth to more or less completely formed young fry, as distinguished from fish that spawn eggs. Most selachii (the majority of sharks, stingrays, eagle rays, and giant rays) are viviparous fish.
Is an example of bony fish answer?
Explanation: Examples are sharks, rays, dog-fish, skates, sturgion.
Which of the following characters are bony fishes?
Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils. Osteichthyes includes the largest number of living species of all scientific classes of vertebrates, more than 28,000 species.
Which of the following are bony fishes?
Sunfish, bass, catfish, trout, and pike are examples of bony fish, as are the freshwater tropical fish that you see in aquariums. Other species of bony fish include: Tuna.