There are 15 species of herring but the most common is the Atlantic Herring.
The bottlenose dolphin scientific name is Tursiops truncatus and the only other species closely related to the bottlenose dolphin is the Tursiops aduncus.
Adult bottlenose dolphins range from two to four meters or six to thirteen feet.
Most dolphins live in the ocean, but there are some species which live in rivers.
Besides the common predators like big sharks and occasionally killer whales, humans are the top dolphin killers.