What sharks eat depends on the type of shark and the availability of food. There are predator sharks and scavenger sharks. Predator sharks are carnivorous; they hunt large, meaty prey such as dolphins, sea lions, and large fish. They have strong, powerful jaws and can easily rip flesh from bone and even bite through bone. Sometimes - and especially when they've been hungry for a while - these sharks will go into frenzy when they smell blood. When this happens, they will temporarily lose their vision and go into attack mode, eating any animal that they can smell; during these times they may bite or eat humans, but sharks do not actively hunt humans.Scavenger sharks mostly drift along the sea floor, and tend to be smaller animals. Their appetites are not as specialized as the appetites of predator sharks; they are content to eat smaller, less protein-rich prey such as mollusks, squid, clams, and lobsters when available. These types of sharks rarely, if ever, go aggressively after fast-swimming prey.If a shark cannot find food, it can survive for some time from the oil in its liver; it will feed again when opportunity presents itself.