The weave also shark grow larvae hatched in utero to absorb the secretions from the mother (with umbilical cord) grow by receiving a supply of such nutrients from the maternal to form organs placentoid in utero. Individual in parthenogenesis descended rarely, is hammerhead shark in 2007, Kamasutogarizame, that one fish each one by being pregnant and childbirth in parthenogenetic reproduction has been confirmed by genetic analysis in 2008. However, towards the Kamasutogarizame died during pregnancy.
Those of carnivorous is often some (such as the basking shark) those of plankton-eating. In particular, species of large, trend of plankton-eating is strong. Centered on seafood, seeds of carnivorous prey to marine mammals, marine reptiles, and birds. Intended to aim the big game, that it may be mistaken for human prey, such as seals, and feared the man-eating shark. It is risk of attacked is high while that they come into existence divers noisy when viewed from shark is large, surfers are very similar to the seal when viewed from below. Species aim and shellfish inhabit the seabed quietly, there is little that a person is attacked.
Teeth small basking shark and whale shark that fall into the category of the largest among the fish, swim while opening the mouth, and eat by filtering plankton in the gills swallowed along with the seawater. I seen manta rays and the like (manta ray) The feeding behavior like this. Sharks extant are classified in 9 eyes, to provide a two-level classification as a superorder. According to the classification of Nelson (2006), extant sharks are included in the all shark subprovince Selachii. In Itaera subclass, I show below an overview of the overall classification, including the fossil species.
Sharks are also used as ingredients, that flesh is processed into fish paste products such as kamaboko hanpen or by grinding in many cases. Meat of shark is a food that is suitable for up to an old man from a child for low-calorie, low-fat, high protein, bone is a cartilaginous all, there is also a movement that also be reviewed in the region had no habit of edible until now. Sharks uses a urea osmoregulation fluid, urea is accumulated in the body tissue. Therefore, it would be cause ammonia freshness falls, it is not suitable for cooking, such as the fish of the general. However, in some cases it has been prized as seafood in the mountains before the corruption is slow, refrigeration technology advances because of the ammonia [10]. Juvenile is a surprisingly tasty for the amount of urea that has been accumulated is less.