This book is about sharks born during the Second World War. Sharks are experiments by Russians during the war. Russians are carrying it on U - boats, and U - boats are shot down and sunk into enemy planes. The U boat fell to the ocean floor at thousands of feet above sea level. In 1996, two submarines began shooting domestic geographic documentaries. They found a brass box that looks like a coffin, but the rectangular box was about 9 feet long and 3 feet wide.
Lamniformes: They are often called salmon sharks. These include Goblin Shark, Basking Shark, Giant Shark, Long Tail Shark, Short Fin and Long Fin Shark, and a wonderful White Shark. They are known for the breeding of big baboons and eggs. Lamniformes also includes extinct Grand Shark (Carcharodon megalodon). The shark's teeth are not fixed directly to the jaw but are embedded in the gums and are constantly being replaced throughout their lifetime. Multiple rows of replacement teeth grow in the inner groove of the crucible and steadily move forward compared to the conveyor belt; some sharks lose more than 30,000 teeth during their lifetime. The tooth replacement frequency varies from every 8 to 10 days every several months. In most species, the teeth are exchanged one at a time, not simultaneously changing the entire row at the same time. This can be seen in Cookie shark.
The huge shark's teeth are similar to the modern white shark's teeth, triangle, jagged, and symmetrical. Unlike modern white shark teeth, they are larger and thicker, the saw teeth of each tooth appear at regular intervals, and they have a bullet (a darker chevron region near the root). The largest existing giant shark's teeth are 17.8 cm (6.9 inches) long, about 3 times the white shark (usually about 5.4 cm). In addition, Megalodon has intense bite; its bite is 3 meters in diameter (about 9.8 feet), which is several times larger than the average size of white sharks.