--- title: Sharks by kind: great white, tiger, bull and hammerhead — a lesson of Mova's school · trees and pragmatics description: «Sharks by kind: great white, tiger, bull and hammerhead», a lesson of the biology course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Sharks are not all the same monster from a film. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/) / Sharks by kind: great white, tiger, bu… # Sharks by kind: great white, tiger, bull and hammerhead Lesson 310 of the biology course of Mova's primary school: 21 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/0/) — Sharks are not all the same monster from a film. - [1](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/1/) — The great white hunts seals, the tiger shark eats almost anything, the bull shark swims up rivers, and the hammerhead sweeps the sand for hidden stingrays. - [2](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/2/) — Hold a great white tooth in your hand: a triangle with saw edges. - [3](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/3/) — Behind each tooth in the jaw wait rows of spares that move forward like a conveyor belt, so a shark can lose and replace thousands of teeth in its life. - [4](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/4/) — Off South Africa a great white rushes up from the dark deep water at a seal on the surface and can launch right out of the water. - [5](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/5/) — From below, a seal shows as a dark shape against the bright surface, and so, sadly, can a surfer on a board. - [6](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/6/) — Even so, all sharks together make only about 70 unprovoked bites on people a year worldwide (unprovoked means nobody had poked, caught or fed the shark), and many sharks are now in danger from fishing. - [7](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/7/) — Even Peter Benchley, who wrote Jaws, later spent years working to protect them. - [8](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/8/) — A great white has about 300 teeth in rows, triangular with saw edges for slicing seal fat, and new teeth move forward like a conveyor belt; a shark can lose and replace thousands of teeth in its life. - [9](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/9/) — Great whites usually hunt seals, fish and dead whales; most bites on people are thought to be mistakes or test bites, and often the shark swims away. - [10](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/10/) — All sharks together make only about 70 unprovoked bites on people a year worldwide, reported. - [11](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/11/) — Off South Africa, great whites rush up from deep water at seals and can launch fully into the air; attacking from below works because the seal cannot see into the dark water. - [12](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/12/) — Peter Benchley, who wrote Jaws, later spent years working to protect sharks. - [13](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/13/) — Great whites keep their muscles, eyes and brain warmer than the sea around them, using special blood vessels that hold the heat in, which helps them swim fast in cold water. - [14](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/14/) — Tiger sharks eat almost anything, from fish, turtles, sea snakes and birds to rubbish like tyres and number plates, reported; their notched teeth cut turtle shells, and young ones have stripes that fade with age. - [15](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/15/) — In Hawaii, tiger sharks gather every summer when young albatrosses learn to fly and drop into the sea. - [16](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/16/) — Bull sharks can live in fresh water as well as the sea, because their kidneys and glands adjust to water without salt; bull sharks lived for years in a lake on a golf course in Australia after a flood. - [17](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/17/) — Bull sharks are short, heavy and strong and live in warm, shallow, murky coastal water near people, so they are among the sharks most often involved in bites; swimmers are told to avoid murky river mouths, especially at dawn and dusk. - [18](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/18/) — A hammerhead's wide head spreads its eyes and electric sensors far apart, sweeping the sand like a metal detector for hidden stingrays and helping it see further around; great hammerheads pin stingrays down with their heads. - [19](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/19/) — Scalloped hammerheads gather in big schools by day near underwater mountains, like off the Galápagos, and split up at night to hunt alone; many hammerheads are endangered by fishing, especially for their fins. - [20](https://md.mova.elamur.ai/free/en/corpora/school/biology/310-sharks-by-kind-great-white-tiger-bull-and-hammerhead/20/) — Most sharks have five gill slits on each side, and a few kinds have six or seven; great whites must keep swimming so water flows over their gills, while nurse sharks can rest and pump water over theirs. - ← previous: [Frogs and toads near home: spawn, croaking choruses, toad crossings and the fire-bellied toad](https://md.mova.elamur.ai/free/en/corpora/school/biology/309-frogs-and-toads-near-home-spawn-croaking-choruses-toad-crossings-and-the-fire-bellied-toad/) - next →: [Sharks by kind, small and strange: walking sharks, wobbegongs, cookiecutters and goblin sharks](https://md.mova.elamur.ai/free/en/corpora/school/biology/311-sharks-by-kind-small-and-strange-walking-sharks-wobbegongs-cookiecutters-and-goblin-sharks/) - ↑ back to [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/)