アカボウクジラ
Diving deep to catch prey, they open their jaws in a way that creates suction. A pair of throat grooves allows the whale to expand this region when sucking in its prey. This type of jaw and muscular construction makes them appear to have a smiling appearance. Their skull has an indentation, and is shaped like a grooved bike helmet on top of a goose-like nose, giving it the "beak" name. All the beaked whales have this general appearance, but Cuvier's beaked whale has a shorter beak compared to others in the family "Ziphiidae". They have a slightly bulbous melon, which can be either white or sometimes browner for females. Cuvier's beaked whale has a particularly gradually sloping head leading to the melon and a small, softly defined rostrum, which gives them their nickname or alternative name goose-beaked whale.