The loading screens give you true facts about sharks, such as how their rough spike scales give their skin a feel like sandpaper. Sharks can see well in poor dark and at night. Sharks have electroreceptor organs that allow them to detect temperature shifts and electromagnetic fields. Some sharks have a spiracle system that allows them to draw in water to their respatory systems while they are at rest. Sharks have eyelids. Sharks have been swimming the oceans for over 455 million years. The whale shark is the largest fish in the world. Sharks will regrow their teeth all of their lives, going through thousands of teeth over their lifetime. A hammerhead sharks head contains a massive number of electroreceptors, which allows them to detect their favourite prey (stingrays) even when they are buried under the sand. Sharks have cartilage instead of bones. A great white shark can smell a single drop of blood in an Olympic-sized swimming pool.